Compounds for treating spinal muscular atrophy

ABSTRACT

Provided herein are compounds, compositions thereof and uses therewith for treating spinal muscular atrophy. In a specific embodiment, provided herein are compounds of a form that may be used to modulate the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. In another specific embodiment, provided herein are compounds of a form that may be used to modulate the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene. In yet another embodiment, provided herein are compounds of a form that may be used to modulate the inclusion of exon 7 of SMN1 and SMN2 into mRNA that is transcribed from the SMN1 and SMN2 genes, respectively.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a reissue application of U.S. Pat. No. 9,617,268, issued on Apr. 11, 2017, filed as U.S. patent application Ser. No. 14/369,294 on Jun. 27, 2014, which is a U.S. national stage application of International Patent Application No. PCT/US2012/071899, filed Dec. 28, 2012, which claims the benefit of U.S. Provisional Application No. 61/582,064, Dec. 30, 2011, each of PCT/US2013/031232, filed Mar 14, 2013, which claims the benefit of priority to U.S. Provisional Application Ser. No. 61/614,932, filed Mar. 23, 2012, which is incorporated herein by reference herein in its entirety and for all purposes.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

The technology described herein has not been made with U.S. Government support.

THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT

PCT Therapeutics, Inc. and F. Hoffmann-La Roche AG.

STATEMENT ON JOINT RESEARCH AGREEMENT

The subject matter disclosed was developed and the claimed invention was made by, or on behalf of, one or more parties to a joint research agreement that was in effect on or before the effective filing date of the claimed invention;

the claimed invention was made as a result of activities undertaken within the scope of the joint research agreement; and

the application for patent for the claimed invention discloses or is amended to disclose the names of the parties to the joint research agreement.

INTRODUCTION

Provided herein are compounds, compositions thereof and uses therewith for treating Spinal Muscular Atrophy.

BACKGROUND

Spinal muscular atrophy (SMA), in its broadest sense, describes a collection of inherited and acquired central nervous system (CNS) diseases characterized by progressive motor neuron loss in the spinal cord and brainstem causing muscle weakness and muscle atrophy. The most common form of SMA is caused by mutations in the Survival Motor Neuron (SMN) gene and manifests over a wide range of severity affecting infants through adults (Crawford and Pardo, Neurobiol. Dis., 1996, 3:97).

Infantile SMA is the most severe form of this neurodegenerative disorder. Symptoms include muscle weakness, poor muscle tone, weak cry, limpness or a tendency to flop, difficulty sucking or swallowing, accumulation of secretions in the lungs or throat, feeding difficulties, and increased susceptibility to respiratory tract infections. The legs tend to be weaker than the arms and developmental milestones, such as lifting the head or sitting up, cannot be reached. In general, the earlier the symptoms appear, the shorter the lifespan. As the motor neuron cells deteriorate, symptoms appear shortly afterward. The severe forms of the disease are fatal and all forms have no known cure. The course of SMA is directly related to the rate of motor neuron cell deterioration and the resulting severity of weakness. Infants with a severe form of SMA frequently succumb to respiratory disease due to weakness in the muscles that support breathing. Children with milder forms of SMA live much longer, although they may need extensive medical support, especially those at the more severe end of the spectrum. The clinical spectrum of SMA disorders has been divided into the following five groups.

(a) Type 0 SMA (In Utero SMA) is the most severe form of the disease and begins before birth. Usually, the first symptom of Type 0 SMA is reduced movement of the fetus that can first be observed between 30 and 36 weeks of pregnancy. After birth, newborns have little movement and difficulties with swallowing and breathing.

(b) Type 1 SMA (Infantile SMA or Werdnig-Hoffmann disease) presents the first symptoms between 0 and 6 months: This type of SMA is also very severe. Patients never achieve the ability to sit, and death usually occurs within the first 2 years without respiratory support.

(c) Type 2 SMA (Intermediate SMA) has an age of onset at 7-18 months. Patients achieve the ability to sit unsupported, but never stand or walk unaided. Prognosis in this group is largely dependent on the degree of respiratory involvement.

(d) Type 3 SMA (Juvenile SMA or Kugelberg-Welander disease) is generally diagnosed after 18 months. Type 3 SMA individuals are able to walk independently at some point during the course of the disease but often become wheelchair-bound during youth or adulthood.

(e) Type 4 SMA (Adult onset SMA). Weakness usually begins in late adolescence in the tongue, hands or feet, then progresses to other areas of the body. The course of adult onset SMA is much slower and has little or no impact on life expectancy.

The SMN gene has been mapped by linkage analysis to a complex region in chromosome 5q. In humans, this region contains an approximately 500 thousand base pairs (kb) inverted duplication resulting in two nearly identical copies of the SMN gene. SMA is caused by an inactivating mutation or deletion of the telomeric copy of the gene (SMN1) in both chromosomes, resulting in the loss of SMN1 gene function. However, all patients retain the centromeric copy of the gene (SMN2), and the copy number of the SMN2 gene in SMA patients generally correlates inversely with the disease severity; i.e., patients with less severe SMA have more copies of SMN2. Nevertheless, SMN2 is unable to compensate completely for the loss of SMN1 function due to alternative splicing of exon 7 caused by a translationally silent C to T mutation in exon 7. As a result, the majority of transcripts produced from SMN2 lack exon 7 (SMN2 Δ7), and encode a truncated Smn protein that has an impaired function and is rapidly degraded.

Smn is thought to play a role in RNA processing and metabolism, having a well characterized function of mediating the assembly of a specific class of RNA-protein complexes termed snRNPs. Smn may have other functions in motor neurons, however its role in preventing the selective degeneration of motor neurons is not well established.

In most cases, SMA is diagnosed based on clinical symptoms and by the presence of at least on copy of the SMN1 gene test. However, in approximately 5% of cases SMA is caused by mutation in genes other than the inactivation of SMN1, some known and others not yet defined. In some cases, when the SMN1 gene test is not feasible or does not show any abnormality, other tests such as an electromyography (EMG) or muscle biopsy may be indicated.

Medical care for SMA patients at present is limited to supportive therapy including respiratory, nutritional and rehabilitation care; there is no drug known to address the cause of the disease. Current treatment for SMA consists of prevention and management of the secondary effects of chronic motor unit loss. The major management issue in Type 1 SMA is the prevention and early treatment of pulmonary problems, which are the cause of death in the majority of the cases. While some infants afflicted with SMA grow to be adults, those with Type 1 SMA have a life expectancy of less than two years.

Several mouse models of SMA have been developed. In particular, the SMNΔ7 model (Le et al., Hum. Mol. Genet., 2005, 14:845) carries both the SMN2 gene and several copies of the SMN2Δ7 cDNA and recapitulates many of the phenotypic features of Type 1 SMA. The SMNΔ7 model can be used for both SMN2 expression studies as well as the evaluation of motor function and survival. The C/C-allele mouse model (Jackson Laboratory strain #008714) provides a less severe SMA disease model, with mice having reduced levels of both SMN2 FL mRNA and Smn protein. The C/C-allele mouse phenotype has the SMN2 gene and a hybrid mSmn1-SMN2 gene that undergoes alternative splicing, but does not have overt muscle weakness. The C/C-allele mouse model is used for SMN2 expression studies.

As a result of improved understanding of the genetic basis for SMA, several strategies for treatment have been explored, but none have yet demonstrated success in the clinic.

Gene replacement of SMN1, using viral delivery vectors, and cell replacement, using differentiated SMN1^(+/+) stem cells, have demonstrated efficacy in animal models of SMA. More research is needed to determine the safety and immune response and to address the requirement for the initiation of treatment at the neonatal stage before these approaches can be applied to humans.

Correction of alternative splicing of SMN2 in cultured cells has also been achieved using synthetic nucleic acids as therapeutic agents: (i) antisense oligonucleotides that target sequence elements in SMN2 pre-mRNA and shift the outcome of the splicing reaction toward the generation of full length SMN2 mRNA (Passim et al., Sci. Transl. Med., 2011, 3:72ra18; and, Hua et al., Nature, 2011, 478:123) and (ii) trans-splicing RNA molecules that provide a fully functional RNA sequence that replace the mutant fragment during splicing and generate a full length SMN1 mRNA (Coady and Lorson, J Neurosci., 2010, 30:126).

Other approaches under exploration include searching for drugs that increase Smn levels, enhance residual Smn function, or compensate for loss of Smn. Aminoglycosides have been shown to enhance expression of stabilized Smn produced from SMN2 Δ7 mRNA by promoting the translational read-through of the aberrant stop codon, but have poor central nervous system penetration and are toxic after repeated dosing. Chemotherapeutic agents, such as aclarubicin, have been shown to increase Smn in cell culture; however, the toxicity profile of these drugs prohibits long-term use in SMA patients. Some drugs under clinical investigation for the treatment of SMA include transcription activators such as histone deacetylase (“HDAC”) inhibitors (e.g., butyrates, valproic acid, and hydroxyurea), and mRNA stabilizers (mRNA decapping inhibitor RG3039 from Repligen), intended to increase the amount of total RNA transcribed from the SMN2 gene. However, the use of HDAC inhibitors or mRNA stabilizers does not address the underlying cause of SMA and may result in a global increase in transcription and gene expression with potential safety problems in humans.

In an alternative approach, neuroprotective agents such as olesoxime have been chosen for investigation. Such strategies are not aimed at producing functional Smn for the treatment of SMA, but instead are being explored to protect the Smn-deficient motor neurons from neurodegeneration.

A system designed to identify compounds that increase the inclusion of exon 7 of SMN into RNA transcribed from the SMN2 gene and certain benzooxazole and benzoisoxazole compounds identified thereby have been described in International Application PCT/US2009/003238 filed May 27, 2009 (published as International Publication Number WO2009/151546 and United States Publication Number US2011/0086833). A system designed to identify compounds that produce a stabilized Smn protein from SMN2 Δ7 mRNA and certain isoindolinone compounds identified thereby have been described in International Application PCT/US2009/004625 filed Aug. 13, 2009 (published as International Publication Number WO2010/019236 and United States Publication Number US2011/0172284). Each of the foregoing documents is herein incorporated in their entirety and for all purposes.

All other documents referred to herein are incorporated by reference into the present application as though fully set forth herein.

Despite the progress made in understanding the genetic basis and pathophysiology of SMA, there remains a need to identify compounds that alter the course of spinal muscular atrophy, one of the most devastating childhood neurological diseases.

SUMMARY

In one aspect, provided herein are compounds of Formula (I):

or a form thereof, wherein: w₁, w₂, R_(a) and R_(b) are as defined herein. In one embodiment, provided herein is a pharmaceutical composition comprising a compound of Formula (I) or a form thereof, and a pharmaceutically acceptable carrier, excipient or diluent. In a specific embodiment, provided herein is a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof for treating spinal muscular atrophy (SMA).

SMA is caused by deletion or mutation of the SMN1 gene, resulting in selective degeneration of Smn-deficient motor neurons. Although human subjects retain several copies of the SMN2 gene, the small amount of functional Smn protein expressed from SMN2 does not fully compensate for the loss of Smn that would have been expressed from the SMN1 gene. The compounds, compositions thereof and uses therewith described herein are based, in part, on the Applicants discovery that a compound of Formula (I) increases the inclusion of exon 7 of SMN2 into mRNA that is transcribed from an SMN2 minigene. The minigene reproduces the alternative splicing reaction of exon 7 of SMN2 which results in the loss of exon 7 in the majority of SMN2 transcripts. Thus, compounds of Formula (I) or a form thereof may be used to modulate inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. Applicants have also discovered that a compound of Formula (I) increases the inclusion of exon 7 of SMN1 into mRNA that is transcribed from an SMN1 minigene. Thus, compounds of Formula (I) or a form thereof may be used to modulate the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene.

In a specific embodiment, provided herein are compounds of Formula (I) or a form thereof that may be used to modulate the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. In another specific embodiment, provided herein are compounds of Formula (I) or a form thereof that may be used to modulate the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene. In yet another embodiment, provided herein are compounds of Formula (I) or a form thereof that may be used to modulate the inclusion of exon 7 of SMN1 and SMN2 into mRNA that is transcribed from the SMN1 and SMN2 genes, respectively.

In another aspect, provided herein is the use of a compound of Formula (I) or a form thereof for treating SMA. In a specific embodiment, provided herein is a method for treating SMA in a human subject in need thereof, comprising administering to the subject an effective amount of a compound of Formula (I) or a form thereof The compound of Formula (I) or a form thereof is preferably administered to a human subject in a pharmaceutical composition. In another specific embodiment, provided herein is the use of a compound of Formula (I) for treating SMA, wherein the compound enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. Without being limited by theory, compounds of Formula (I) enhance inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene and increase levels of Smn protein produced from the SMN2 gene, and thus can be used to treat SMA in a human subject in need thereof.

In another aspect, provided herein are primers and/or probes described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 8, 11 or 13, and/or SEQ ID NO. 2, 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) and the use of those primers and/or probes. In a specific embodiment, provided herein is an isolated nucleotide sequence comprising SEQ ID NOs: 1, 2, 3, 7, 8, 9, 10, 11, 12 or 13. In another specific embodiment, provided herein is an isolated nucleotide sequence consisting essentially of SEQ ID NOs: 1, 2, 3, 7, 8, 9, 10, 11, 12 or 13. In another specific embodiment, provided herein is an isolated nucleotide sequence consisting of SEQ ID NOs: 1, 2, 3, 7, 8, 9, 10, 11, 12 or 13.

In certain embodiments, the amount of mRNA that is transcribed from the SMN1 gene and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 may be used as a biomarker for SMA, such as disclosed herein. In other embodiments, the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 may be used as a biomarker for treating a patient with a compound, such as disclosed herein. In a specific embodiment, the patient is an SMA patient.

In certain embodiments, the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 as well as the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 may be used as biomarkers for treating a patient with a compound, such as disclosed herein. In a specific embodiment, the patient is an SMA patient.

In accordance with these embodiments, an SMN primer(s) and/or an SMN probe described below may be used in assays, such as PCR (e.g., qPCR), rolling circle amplification, and RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR) to assess and/or quantify the amount of mRNA that is transcribed from the SMN1 gene and/or SMN2 gene and does or does not include exon 7 of SMN1 and/or SMN2.

In a specific embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 8, 11 or 13 and/or SEQ ID NO. 2, 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to determine whether a compound (e.g., a compound of Formula (I) or a form thereof) enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from an SMN2 gene.

In a specific embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 8, 11 or 13 and/or SEQ ID NO. 2, 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to determine whether a compound (e.g., a compound of Formula (I) or a form thereof) enhances the inclusion of exon 7 of SMN1 into mRNA that is transcribed from an SMN1 gene.

In a specific embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 8, 11 or 13 and/or SEQ ID NO. 2, 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to determine whether a compound (e.g., a compound of Formula (I) or a form thereof) enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from an SMN1 and/or SMN2 gene.

In another embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 7, 11 or 13 and/or SEQ ID NO. 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to monitor the amount of mRNA that is transcribed from the SMN2 gene and includes exon 7 of SMN2 in a patient sample. In a specific embodiment, the patient is an SMA patient.

In another embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 7, 11 or 13 and/or SEQ ID NO. 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to monitor the amount of mRNA that is transcribed from the SMN1 gene and includes exon 7 of SMN1 in a patient sample. In a specific embodiment, the patient is an SMA patient.

In another embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 7, 11 or 13 and/or SEQ ID NO. 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to monitor the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in a patient sample. In a specific embodiment, the patient is an SMA patient.

In another embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 7, 8, 11 or 13 and/or SEQ ID NO. 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to monitor a patient's response to a compound (e.g., a compound of Formula (I) or a form thereof). In a specific embodiment, the patient is an SMA patient.

In another embodiment, provided herein is a method for determining whether a compound (e.g., a compound of Formula (I) disclosed herein) enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, comprising (a) contacting mRNA that is transcribed from an SMN2 minigene described herein or in International Application PCT/US2009/004625, filed Aug. 13, 2009 (published as International Publication Number WO2010/019236) or United States Publication Number US2011/0172284 in the presence of a compound (e.g., a compound of Formula (I) disclosed herein) with a primer(s) described herein (e.g., SEQ ID NO. 1 and/or 2) along with applicable components for, e.g., RT-PCR, RT-qPCR, PCR, endpoint RT-PCR, qPCR or rolling circle amplification; and (b) detecting the amount of mRNA that is transcribed from the minigene and includes exon 7 of the SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the absence of the compound indicates that the compound enhances inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the absence of the compound indicates that the compound does not enhance the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene.

In another embodiment, provided herein is a method for determining whether a compound (e.g., a compound of Formula (I) disclosed herein) enhances the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene, comprising (a) contacting mRNA that is transcribed from an SMN1 minigene described in International Application PCT/US2009/004625, filed Aug. 13, 2009 (published as International Publication Number WO2010/019236) or United States Publication Number US2011/0172284 in the presence of a compound (e.g., a compound of Formula (I) disclosed herein) with a primer(s) described herein (e.g., SEQ ID NO. 1 and/or 2) along with applicable components for, e.g., RT-PCR, RT-qPCR, PCR, endpoint RT-PCR, qPCR or rolling circle amplification; and (b) detecting the amount of mRNA that is transcribed from the minigene and includes exon 7 of the SMN1, wherein (1) an increase in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the absence of the compound indicates that the compound enhances inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the absence of the compound indicates that the compound does not enhance the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene.

In another embodiment, provided herein is a method for determining whether a compound (e.g., a compound of Formula (I) disclosed herein) enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, comprising (a) contacting mRNA that is transcribed from an SMN2 minigene described herein or in International Application PCT/US2009/004625, filed Aug. 13, 2009 (published as International Publication Number WO2010/019236) or United States Publication Number US2011/0172284 in the presence of a compound (e.g., a compound of Formula (I) disclosed herein) with a probe described herein (e.g., SEQ ID NO. 3 or 10) along with applicable components for, e.g., RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification and, as applicable, Northern blot or Southern blot; and (b) detecting the amount of mRNA that is transcribed from the minigene and includes exon 7 of the SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the absence of the compound indicates that the compound enhances inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the absence of the compound indicates that the compound does not enhance the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene.

In another embodiment, provided herein is a method for determining whether a compound (e.g., a compound of Formula (I) disclosed herein) enhances the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene, comprising (a) contacting mRNA that is transcribed from an SMN1 minigene described in International Application PCT/US2009/004625, filed Aug. 13, 2009 (published as International Publication Number WO2010/019236) or United States Publication Number US2011/0172284 in the presence of a compound (e.g., a compound of Formula (I) disclosed herein) with a probe described herein (e.g., SEQ ID NO. 3 or 10) along with applicable components for, e.g., RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification and, as applicable, Northern blot or Southern blot; and (b) detecting the amount of mRNA that is transcribed from the minigene and includes exon 7 of the SMN1, wherein (1) an increase in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the absence of the compound indicates that the compound enhances inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the absence of the compound indicates that the compound does not enhance the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene.

In another embodiment, provided herein is a method for determining whether a compound (e.g., a compound of Formula (I) disclosed herein) enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, comprising (a) contacting mRNA that is transcribed from an SMN2 minigene described herein or in International Application PCT/US2009/004625, filed Aug. 13, 2009 (published as International Publication Number WO2010/019236) or United States Publication Number US2011/0172284 in the presence of a compound (e.g., a compound of Formula (I) disclosed herein) with a primer(s) (e.g., SEQ ID NO. 1 or 2) and/or a probe described herein (e.g., SEQ ID NO. 3 or 10) along with applicable components for, e.g, RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification and, as applicable, Northern blot or Southern blot; and (b) detecting the amount of mRNA that is transcribed from the minigene and includes exon 7 of the SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the absence of the compound indicates that the compound enhances inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN2 in the absence of the compound indicates that the compound does not enhance the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene.

In another embodiment, provided herein is a method for determining whether a compound (e.g., a compound of Formula (I) disclosed herein) enhances the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene, comprising (a) contacting mRNA that is transcribed from an SMN1 minigene described in International Application PCT/US2009/004625, filed Aug. 13, 2009 (published as International Publication Number WO2010/019236) or United States Publication Number US2011/0172284 in the presence of a compound (e.g., a compound of Formula (I) disclosed herein) with a primer(s) (e.g., SEQ ID NO. 1 or 2) and/or a probe described herein (e.g., SEQ ID NO. 3 or 10) along with applicable components for, e.g, RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification and, as applicable, Northern blot or Southern blot; and (b) detecting the amount of mRNA that is transcribed from the minigene and includes exon 7 of the SMN1, wherein (1) an increase in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the absence of the compound indicates that the compound enhances inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the presence of the compound relative to the amount of mRNA that is transcribed from the minigene and includes exon 7 of SMN1 in the absence of the compound indicates that the compound does not enhance the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene.

In another aspect, provided herein are kits comprising a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 8, 11 or 13 and/or SEQ ID NO. 2, 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) and the use thereof.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1, referenced in Biological Example 1, is a schematic drawing of the SMN2 minigene construct, which features the two alternatively spliced mRNA transcripts. The nucleotide added to exon 7 of SMN2 after nucleic residue 48 is indicated by the letter “A,” which could be adenine, cytosine, or thymine. The presence of one or more stop codon(s) generated in Exon 8 is indicated by “Stop.”

FIG. 2, referenced in Biological Example 1, provides the DNA sequence of the minigene from the SMN2-A minigene construct SEQ ID NO. 21 (FIG. 2a). As shown in FIG. 2b, the following subsequences can be found:

-   -   1-70: 5′UTR (deg);     -   71-79: exon 6: start codon and BamHI site (atgggatcc);     -   80-190: exon 6;     -   191-5959: intron 6;     -   5960-6014: exon 7 with A insert (position 6008);     -   6015-6458: intron 7;     -   6459-6481: part of exon 8;     -   6482-8146: BamHI site (sequence at 5′ end), luciferase coding         sequence starting with codon 2 (without initiation codon), Notl         site (sequence at 3′ end), TAA stop codon; and     -   8147-8266: 3′UTR (deg).

FIG. 3, referenced in Biological Example 2, shows the correction of SMN2 minigene alternative splicing in cells treated with rising concentrations of Compound 35 (FIG. 3a) and Compound 626 (FIG. 3b) over a 24 hr period. The levels of full length SMN2 minigene mRNA were quantified using reverse transcription-quantitative PCR (RT-qPCR). The level of full length SMN2 minigene mRNA in compound-treated samples was normalized to that in vehicle-treated samples and plotted as a function of the compound concentration.

FIG. 4, referenced in Biological Example 3, shows the correction of SMN2 alternative splicing in Type 1 SMA patient fibroblasts treated with rising concentrations of Compound 35 (FIG. 4a) and Compound 626 (FIG. 4b) over a 24 hr period. The levels of full length and Δ7 SMN2 mRNAs were quantified using RT-qPCR. The levels of full length and Δ7 SMN2 mRNAs in compound-treated samples were normalized to those in vehicle-treated samples and plotted as a function of the compound concentration.

FIG. 5, referenced in Biological Example 4, shows the correction of SMN2 alternative splicing in Type 1 SMA patient fibroblasts treated with rising concentrations of Compound 35 (FIG. 5a) and Compound 626 (FIG. 5b) over a 24 hr period. The full length and Δ7 SMN2 mRNAs were amplified using reverse transcription-end point PCR (RT-PCR) and PCR products were separated using agarose gel electrophoresis. The top and bottom bands correspond to the full length and Δ7 SMN2 mRNAs respectively. The intensity of each band is proportional to the amount of RNA present in the sample.

FIG. 6, referenced in Biological Example 5, shows the correction of SMN2 alternative splicing (in both the SMN2 gene and the hybrid mouse Smn1-SMN2 gene) in brain and muscle tissues of C/C-allele SMA mouse model treated for 10 days twice per day with 10 mg/kg of Compound 35 (FIG. 6a) and Compound 626 (FIG. 6b). The levels of full length and Δ7 SMN2 mRNAs were quantified using RT-qPCR, the combined full length and Δ7 SMN2 mRNA quantity was set to 1, and fractional quantities of full length and Δ7 SMN2 were calculated.

FIG. 7, referenced in Biological Example 6, shows the correction of SMN2 alternative splicing (in both the SMN2 gene and the hybrid mouse Smn1-SMN2 gene) in brain and muscle tissues of C/C-allele SMA mouse model treated for 10 days twice per day with 10 mg/kg of Compound 35 (FIG. 7a) and Compound 626 (FIG. 7b). The full length and Δ7 SMN2 mRNAs were amplified using RT-PCR. The PCR products were separated using agarose gel electrophoresis. The top and bottom bands correspond to the full length and Δ7 SMN2 mRNAs respectively. The intensity of each band is proportional to the amount of RNA present in the sample. The GAPDH loading control is shown for Compound 626.

FIG. 8, referenced in Biological Example 7, shows a dose dependent increase in Smn protein expression in SMA Type 1 human fibroblast cells treated over a 48 hour period with Compound 35 (FIG. 8a) and Compound 626 (FIG. 8b).

FIG. 9, referenced in Biological Example 8, shows an increase in nuclear speckle counts (gems) in Type 1 SMA patient fibroblasts treated with Compound 35 (FIG. 9a) and Compound 626 (FIG. 9b) over a 48 hour period. Speckles were counted using fluorescence microscopy. The number of speckles in compound-treated samples was normalized to that in vehicle-treated samples and plotted as a function of the compound concentration.

FIG. 10, referenced in Biological Example 9, shows an increase in Smn protein expression (black circles) in motor neurons generated from iPS cells generated from Type 1 SMA patient fibroblasts treated with Compound 35 (FIG. 10a) and Compound 626 (FIG. 10b) over a 72 hour period. The level of Smn protein was quantified using Smn immunostaining and confocal fluorescence microscopy. The level of Smn protein in compound-treated samples was normalized to that in vehicle-treated samples and plotted as a function of the compound concentration.

FIG. 11, referenced in Biological Example 11, shows increased Smn protein expression in tissues (Brain: FIG. 11a; Spinal cord: FIG. 11b; and Muscle: FIG. 11c) of C/C-allele SMA mouse model treated for 10 days twice per day with 10 mg/kg of Compound 35 and Compound 626.

FIG. 12, referenced in Biological Example 12, shows a dose dependent increase in Smn protein expression in tissues (Brain: FIG. 12a and FIG. 12b; Spinal cord: FIG. 12c and FIG. 12d; and Muscle: FIG. 12e and FIG. 12f) of neonatal Δ7 SMA mouse model treated for 7 days once per day with indicated doses of Compound 35 and Compound 626, respectively.

FIG. 13, referenced in Biological Example 13, shows differences in body weight of neonatal Δ7 SMA mouse model treated until postnatal day 66 with Compound 35 (FIG. 13a) and until postnatal day 76 with Compound 626 (FIG. 13b).

FIG. 14, referenced in Biological Example 14, shows improved righting reflex of neonatal Δ7 SMA mouse model treated with Compound 35.

FIG. 15, referenced in Biological Example 15, shows improved survival in a neonatal Δ7 SMA mouse model treated with Compound 35 (FIG. 15a) and Compound 626 (FIG. 15b).

FIG. 16, referenced in Biological Example 15, shows increased Smn protein expression in tissues (Brain: FIG. 16a; and Muscle: FIG. 16b) in a neonatal Δ7 SMA mouse model treated until postnatal day 47-55 (P47-55) with Compound 35 and until postnatal day 68 (P68) with Compound 626 relative to vehicle treated and age-matched heterozygous mice.

DETAILED DESCRIPTION

Provided herein are compounds of Formula (I):

or a form thereof, wherein:

-   -   w₁ and w₂ are C—R₁ or C—R₂; wherein, one of w₁ and w₂ is C—R₁         and the other is C—R₂, provided that, when w₁ is C—R₁, then w₂         is C—R₂; or, when w₁ is C—R₂, then w₂ is C—R₁;     -   R₁ is C₁₋₈alkyl, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino,         C₁₋₈alkoxy-C₁₋₈alkyl-amino, (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino,         (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino, amino-C₁₋₈alkyl,         C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         amino-C₁₋₈alkyl-amino, (amino-C₁₋₈alkyl)₂-amino,         (amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino,         (C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino,         [(C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         amino-C₁₋₈alkoxy, C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy,         amino-C₂₋₈alkenyl, C₁₋₈alkyl-amino-C₂₋₈alkenyl,         (C₁₋₈alkyl)₂-amino-C₂₋₈alkenyl, amino-C₂₋₈alkynyl,         C₁₋₈alkyl-amino-C₂₋₈alkynyl, (C₁₋₈alkyl)₂-amino-C₂₋₈alkynyl,         halo-C₁₋₈alkyl-amino, (halo-C₁₋₈alkyl)₂-amino,         (halo-C₁₋₈alkyl)(C₁₋₈alkyl)amino, hydroxy-C₁₋₈alkyl,         hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl)₂-amino, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino,         (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl-amino,         [(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         [(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         heterocyclyl, heterocyclyl-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkoxy,         heterocyclyl-amino, (heterocyclyl)(C₁₋₈alkyl)amino,         heterocyclyl-amino-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkyl-amino,         (heterocyclyl-C₁₋₈alkyl)₂-amino,         (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         heterocyclyl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (heterocyclyl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         heterocyclyl-oxy, heterocyclyl-carbonyl,         heterocyclyl-carbonyl-oxy, aryl-C₁₋₈alkyl-amino,         (aryl-C₁₋₈alkyl)₂-amino, (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         aryl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (aryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, heteroaryl,         heteroaryl-C₁₋₈alkyl, heteroaryl-C₁₋₈alkoxy, heteroaryl-amino,         heteroaryl-C₁₋₈alkyl-amino, (heteroaryl-C₁₋₈alkyl)₂-amino,         (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         heteroaryl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (heteroaryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl or         (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl;     -   wherein, each instance of heterocyclyl and heteroaryl is         optionally substituted with one, two or three R₃ substituents         and one additional, optional R₄ substituent; and,     -   wherein, alternatively, each instance of heterocyclyl and         heteroaryl is optionally substituted with one, two, three or         four R₃ substituents;     -   R₂ is aryl, aryl-amino, aryl-amino-carbonyl, heterocyclyl,         heteroaryl or heteroaryl-amino;     -   wherein, each instance of aryl, heterocyclyl and heteroaryl is         optionally substituted with one, two or three R₆ substituents         and one additional, optional R₇ substituent;     -   R_(a) is, in each instance, independently selected from         hydrogen, halogen or C₁₋₈alkyl;     -   R_(b) is hydrogen, halogen, C₁₋₈alkyl or C₁₋₈alkoxy;     -   R₃ is, in each instance, independently selected from cyano,         halogen, hydroxy, oxo, C₁₋₈alkyl, halo-C₁₋₈alkyl,         C₁₋₈alkyl-carbonyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy,         C₁₋₈alkoxy-C₁₋₈alkyl, C₁₋₈alkoxy-carbonyl, amino,         C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, amino-C₁₋₈alkyl,         C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         amino-C₁₋₈alkyl-amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino,         C₁₋₈alkyl-carbonyl-amino, C₁₋₈alkoxy-carbonyl-amino,         hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)₂-amino or         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino;     -   R₄ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-C₁₋₈alkyl,         C₃₋₁₄cycloalkyl-amino, aryl-C₁₋₈alkyl, aryl-C₁₋₈alkoxy-carbonyl,         aryl-sulfonyloxy-C₁₋₈alkyl, heterocyclyl or         heterocyclyl-C₁₋₈alkyl; wherein, each instance of         C₃₋₁₄cycloalkyl, aryl and heterocyclyl is optionally substituted         with one, two or three R₅ substituents;     -   R₅ is, in each instance, independently selected from halogen,         hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkoxy,         halo-C₁₋₈alkoxy, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or         C₁₋₈alkyl-thio;     -   R₆ is, in each instance, independently selected from halogen,         hydroxy, cyano, nitro, C₁₋₈alkyl, C₂₋₈alkenyl, halo-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, amino,         C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio; and,     -   R₇ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-oxy, aryl, heterocyclyl         or heteroaryl.         Embodiments

In one embodiment of a compound of Formula (I), R₁ is C₁₋₈alkyl, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino, (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino, (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino, amino-C₁₋₈alkyl, C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, amino-C₁₋₈alkyl-amino, (amino-C₁₋₈alkyl)₂-amino, (amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino, (C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino, (C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, [(C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino, amino-C₁₋₈alkoxy, C₁₋₈alkyl-amino-C₁₋₈alkoxy, (C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy, C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy, (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy, (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy, amino-C₂₋₈alkenyl, C₁₋₈alkyl-amino-C₂₋₈alkenyl, (C₁₋₈alkyl)₂-amino-C₂₋₈alkenyl, amino-C₂₋₈alkynyl, C₁₋₈alkyl-amino-C₂₋₈alkynyl, (C₁₋₈alkyl)₂-amino-C₂₋₈alkynyl, halo-C₁₋₈alkyl-amino, (halo-C₁₋₈alkyl)₂-amino, (halo-C₁₋₈alkyl)(C₁₋₈alkyl)amino, hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)₂-amino, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino, hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl, (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy, (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy, hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino, (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino, (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl-amino, [(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino, [(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl](C₁₋₈alkyl)amino, heterocyclyl, heterocyclyl-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkoxy, heterocyclyl-amino, (heterocyclyl)(C₁₋₈alkyl)amino, heterocyclyl-amino-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkyl-amino, (heterocyclyl-C₁₋₈alkyl)₂-amino, (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino, heterocyclyl-C₁₋₈alkyl-amino-C₁₋₈alkyl, (heterocyclyl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, heterocyclyl-oxy, heterocyclyl-carbonyl, heterocyclyl-carbonyl-oxy, aryl-C₁₋₈alkyl-amino, (aryl-C₁₋₈alkyl)₂-amino, (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino, aryl-C₁₋₈alkyl-amino-C₁₋₈alkyl, (aryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, heteroaryl, heteroaryl-C₁₋₈alkyl, heteroaryl-C₁₋₈alkoxy, heteroaryl-amino, heteroaryl-C₁₋₈alkyl-amino, (heteroaryl-C₁₋₈alkyl)₂-amino, (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino, heteroaryl-C₁₋₈alkyl-amino-C₁₋₈alkyl, (heteroaryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl or (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl; wherein, each instance of heterocyclyl and heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is C₁₋₈alkoxy-C₁₋₈alkyl-amino, (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino, (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino, amino-C₁₋₈alkyl, C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, amino-C₁₋₈alkyl-amino, (amino-C₁₋₈alkyl)₂-amino, (amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino, (C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino, (C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, [(C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino, amino-C₁₋₈alkoxy, C₁₋₈alkyl-amino-C₁₋₈alkoxy, (C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy, C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy, (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy, (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy, amino-C₂₋₈alkenyl, C₁₋₈alkyl-amino-C₂₋₈alkenyl, (C₁₋₈alkyl)₂-amino-C₂₋₈alkenyl, amino-C₂₋₈alkynyl, C₁₋₈alkyl-amino-C₂₋₈alkynyl, (C₁₋₈alkyl)₂-amino-C₂₋₈alkynyl, halo-C₁₋₈alkyl-amino, (halo-C₁₋₈alkyl)₂-amino, hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)₂-amino, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino, hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl, (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy, (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy, hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino, (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino, (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl-amino, [(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino, [(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl](C₁₋₈alkyl)amino, heterocyclyl, heterocyclyl-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkoxy, heterocyclyl-amino, (heterocyclyl)(C₁₋₈alkyl)amino, heterocyclyl-amino-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkyl-amino, (heterocyclyl-C₁₋₈alkyl)₂-amino, (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino, heterocyclyl-C₁₋₈alkyl-amino-C₁₋₈alkyl, (heterocyclyl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, heterocyclyl-oxy, heterocyclyl-carbonyl, heterocyclyl-carbonyl-oxy, aryl-C₁₋₈alkyl-amino, (aryl-C₁₋₈alkyl)₂-amino, (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino, aryl-C₁₋₈alkyl-amino-C₁₋₈alkyl, (aryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, heteroaryl, heteroaryl-C₁₋₈alkyl, heteroaryl-C₁₋₈alkoxy, heteroaryl-amino, heteroaryl-C₁₋₈alkyl-amino, (heteroaryl-C₁₋₈alkyl)₂-amino, (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino, heteroaryl-C₁₋₈alkyl-amino-C₁₋₈alkyl, (heteroaryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl or (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl; wherein, each instance of heterocyclyl and heteroaryl is optionally substituted.

In another embodiment of a compound of Formula (I), R₁ is heterocyclyl selected from azetidinyl, tetrahydrofuranyl, pyrrolidinyl, piperidinyl, piperazinyl, 1,4-diazepanyl, 1,2,5,6-tetrahydropyridinyl, 1,2,3,6-tetrahydropyridinyl, hexahydropyrrolo[3,4-b]pyrrol-(1H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-(1H)-yl, (3aR,6aR)-hexahydropyrrolo[3,4-b]pyrrol-(1H)-yl, hexahydropyrrolo[3,4-b]pyrrol-(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-(2H)-yl, hexahydropyrrolo[3,4-c]pyrrol-(1H)-yl, (3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-(1H)-yl, octahydro-5H-pyrrolo[3,2-c]pyridinyl, octahydro-6H-pyrrolo[3,4-b]pyridinyl, (4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridinyl, (4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridinyl, hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (7R,8aS)-hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (8aS)-hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (8aR)-hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (8aS)-octahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (8aR)-octahydropyrrolo[1,2-a]pyrazin-(1H)-yl, hexahydropyrrolo[1,2-a]pyrazin-(2H)-one, octahydro-2H-pyrido[1,2-a]pyrazinyl, 3-azabicyclo[3.1.0]hexyl, (1R,5S)-3-azabicyclo[3.1.0]hexyl, 8-azabicyclo[3.2.1]octyl, (1R,5S)-8-azabicyclo[3.2.1]octyl, 8-azabicyclo[3.2.1]oct-2-enyl, (1R,5S)-8-azabicyclo[3.2.1]oct-2-enyl, 9-azabicyclo[3.3.1]nonyl, (1R,5S)-9-azabicyclo[3.3.1]nonyl, 2,5-diazabicyclo[2.2.1]heptyl, (1S,4S)-2,5-diazabicyclo[2.2.1]heptyl, 2,5-diazabicyclo[2.2.2]octyl, 3,8-diazabicyclo[3.2.1]octyl, (1R,5S)-3,8-diazabicyclo[3.2.1]octyl, 1,4-diazabicyclo[3.2.2]nonyl, azaspiro[3.3]heptyl, 2,6-diazaspiro[3.3]heptyl, 2,7-diazaspiro[3.5]nonyl, 5,8-diazaspiro[3.5]nonyl, 2,7-diazaspiro[4.4]nonyl or 6,9-diazaspiro[4.5]decyl; wherein, each instance of heterocyclyl is optionally substituted.

In another embodiment of a compound of Formula (I), R₁ is heterocyclyl selected from azetidin-1-yl, tetrahydrofuran-3-yl, pyrrolidin-1-yl, piperidin-1-yl, piperidin-4-yl, piperazin-1-yl, 1,4-diazepan-1-yl, 1,2,5,6-tetrahydropyridin-3-yl, 1,2,3,6-tetrahydropyridin-4-yl, hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, (3aR,6aR)-hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, (3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, octahydro-5H-pyrrolo[3,2-c]pyridin-5-yl, octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, hexahydropyrrolo[1,2-a]pyrazin-6(2H)-one, (7R,8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-octahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-octahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, octahydro-2H-pyrido[1,2-a]pyrazin-2-yl, 3-azabicyclo[3.1.0]hex-3-yl, 8-azabicyclo[3.2.1]oct-3-yl, (1R,5S)-8-azabicyclo[3.2.1]oct-3-yl, 8-azabicyclo[3.2.1]oct-2-en-3-yl, (1R,5S)-8-azabicyclo[3.2.1]oct-2-en-3-yl, 9-azabicyclo[3.3.1]non-3-yl, (1R,5S)-9-azabicyclo[3.3.1]non-3-yl, 2,5-diazabicyclo[2.2.1]hept-2-yl, (1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl, 2,5-diazabicyclo[2.2.2]oct-2-yl, 3,8-diazabicyclo[3.2.1]oct-3-yl, (1R,5S)-3,8-diazabicyclo[3.2.1]oct-3-yl, 1,4-diazabicyclo[3.2.2]non-4-yl, azaspiro[3.3]hept-2-yl, 2,6-diazaspiro[3.3]hept-2-yl, 2,7-diazaspiro[3.5]non-7-yl, 5,8-diazaspiro[3.5]non-8-yl, 2,7-diazaspiro[4.4]non-2-yl or 6,9-diazaspiro[4.5]dec-9-yl; wherein, each instance of heterocyclyl is optionally substituted.

In another embodiment of a compound of Formula (I), R₁ is substituted heterocyclyl selected from (3aS,6aS)-1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, (3aS,6aS)-5-methylhexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aR,6aR)-1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, (3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, (3aR,6aS)-5-(2-hydroxyethyl)hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, (3aR,6aS)-5-(propan-2-yl)hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, (3aR,6aS)-5-ethylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, (4aR,7aR)-1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aR,7aR)-1-ethyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aR,7aR)-1-(2-hydroxyethyl)octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aS,7aS)-1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aS,7aS)-1-(2-hydroxyethyl)octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (7R,8aS)-7-hydroxyhexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-8a-methyloctahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-8a-methyloctahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (1R,5S,6s)-6-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl, (1R,5S)-8-methyl-8-azabicyclo[3.2.1]oct-3-yl, 9-methyl-9-azabicyclo[3.3.1]non-3-yl, (3-exo)-9-methyl-9-azabicyclo[3.3.1]non-3-yl, (1R,5S)-9-methyl-9-azabicyclo[3.3.1]non-3-yl, (1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]hept-2-yl or (1S,4S)-5-ethyl-2,5-diazabicyclo[2.2.1]hept-2-yl.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-C₁₋₈alkyl, wherein heterocyclyl is selected from morpholinyl, piperidinyl, piperazinyl, imidazolyl or pyrrolidinyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-C₁₋₈alkyl selected from morpholin-4-yl-methyl, morpholin-4-yl-ethyl, morpholin-4-yl-propyl, piperidin-1-yl-methyl, piperazin-1-yl-methyl, piperazin-1-yl-ethyl, piperazin-1-yl-propyl, piperazin-1-yl-butyl, imidazol-1-yl-methyl, imidazol-1-yl-ethyl, imidazol-1-yl-propyl, imidazol-1-yl-butyl, pyrrolidin-1-yl-methyl, pyrrolidin-1-yl-ethyl, pyrrolidin-1-yl-propyl or pyrrolidin-1-yl-butyl; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-C₁₋₈alkoxy, wherein heterocyclyl is selected from pyrrolidinyl, piperidinyl or morpholinyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-C₁₋₈alkoxy selected from pyrrolidin-2-yl-methoxy, pyrrolidin-2-yl-ethoxy, pyrrolidin-1-yl-methoxy, pyrrolidin-1-yl-ethoxy, piperidin-1-yl-methoxy, piperidin-1-yl-ethoxy, morpholin-4-yl-methoxy or morpholin-4-yl-ethoxy; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-amino, wherein heterocyclyl is selected from azetidinyl, pyrrolidinyl, piperidinyl, 9-azabicyclo[3.3.1]nonyl or (1R,5S)-9-azabicyclo[3.3.1]nonyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-amino selected from azetidin-3-yl-amino, pyrrolidin-3-yl-amino, piperidin-4-yl-amino, 9-azabicyclo[3.3.1]non-3-yl-amino, (1R,5S)-9-azabicyclo[3.3.1]non-3-yl-amino, 9-methyl-9-azabicyclo[3.3.1]non-3-yl-amino, (3-exo)-9-methyl-9-azabicyclo[3.3.1]non-3-yl-amino or (1R,5S)-9-methyl-9-azabicyclo[3.3.1]non-3-yl-amino; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is (heterocyclyl)(C₁₋₈alkyl)amino, wherein heterocyclyl is selected from pyrrolidinyl or piperidinyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is (heterocyclyl)(C₁₋₈alkyl)amino selected from (pyrrolidin-3-yl)(methyl)amino or (piperidin-4-yl)(methyl)amino; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-amino-C₁₋₈alkyl, wherein heterocyclyl is selected from tetrahydrofuranyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-amino-C₁₋₈alkyl, selected from 3-(tetrahydrofuran-3-yl-amino)propyl; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-C₁₋₈alkyl-amino-C₁₋₈alkyl, wherein heterocyclyl is selected from tetrahydrofuranyl, thienyl or pyridinyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-C₁₋₈alkyl-amino-C₁₋₈alkyl, selected from 3-[(tetrahydrofuran-2-ylmethyl)amino]propyl, 3-[(thiophenyl-3-ylmethyl)amino]propyl, 3-[(pyridin-2-ylmethyl)amino]propyl or 3-[(pyridin-4-ylmethyl)amino]propyl; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-oxy, wherein heterocyclyl is selected from pyrrolidinyl or piperidinyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-oxy selected from pyrrolidin-3-yl-oxy or piperidin-4-yl-oxy; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-carbonyl, wherein heterocyclyl is selected from piperazinyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-carbonyl selected from piperazin-1-yl-carbonyl; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-carbonyl-oxy, wherein heterocyclyl is selected from piperazinyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heterocyclyl-carbonyl-oxy selected from piperazin-1-yl-carbonyl-oxy; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is aryl-C₁₋₈alkyl-amino-C₁₋₈alkyl, wherein aryl is selected from phenyl; wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is aryl-C₁₋₈alkyl-amino-C₁₋₈alkyl selected from 3-(benzylamino)propyl; wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heteroaryl, wherein heteroaryl is selected from pyridinyl; and, wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heteroaryl selected from pyridin-4-yl; wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heteroaryl-C₁₋₈alkyl, wherein heteroaryl is selected from 1H-imidazolyl; and, wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heteroaryl-C₁₋₈alkyl selected from 1H-imidazol-1-yl-methyl; wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino, wherein heteroaryl is selected from pyridinyl; and, wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino selected from (pyridin-3-yl-methyl)(methyl)amino; wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heteroaryl-C₁₋₈alkyl-amino-C₁₋₈alkyl, wherein heteroaryl is selected from thienyl or pyridinyl; and, wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₁ is heteroaryl-C₁₋₈alkyl-amino-C₁₋₈alkyl selected from thien-3-yl-methyl-amino-propyl, pyridin-2-yl-methyl-amino-propyl, pyridin-3-yl-methyl-amino-propyl or pyridin-4-yl-methyl-amino-propyl; wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₃ is selected from cyano, halogen, hydroxy, oxo, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkyl-carbonyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, C₁₋₈alkoxy-C₁₋₈alkyl, C₁₋₈alkoxy-carbonyl, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, amino-C₁₋₈alkyl, C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, amino-C₁₋₈alkyl-amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino, C₁₋₈alkyl-carbonyl-amino, C₁₋₈alkoxy-carbonyl-amino, hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino or (hydroxy-C₁₋₈alkyl)₂-amino.

In one embodiment of a compound of Formula (I), R₃ is selected from cyano, halogen, hydroxy, oxo, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkoxy, C₁₋₈alkoxy-C₁₋₈alkyl, C₁₋₈alkoxy-carbonyl, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, amino-C₁₋₈alkyl, C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino, C₁₋₈alkoxy-carbonyl-amino, hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino or (hydroxy-C₁₋₈alkyl)₂-amino.

In one embodiment of a compound of Formula (I), R₃ is C₁₋₈alkyl selected from methyl, ethyl, propyl, isopropyl or tert-butyl.

In one embodiment of a compound of Formula (I), R₃ is C₁₋₈alkyl selected from ethyl, propyl, isopropyl or tert-butyl.

In one embodiment of a compound of Formula (I), R₃ is halo-C₁₋₈alkyl selected from trihalo-methyl, dihalo-methyl, halo-methyl, trihalo-ethyl, dihalo-ethyl, halo-ethyl, trihalo-propyl, dihalo-propyl or halo-propyl; wherein, halo is selected from fluoro, chloro, bromo or iodo.

In one embodiment of a compound of Formula (I), R₃ is halo-C₁₋₈alkyl selected from trihalo-methyl, dihalo-methyl, halo-methyl, trihalo-ethyl, dihalo-ethyl, trihalo-propyl or dihalo-propyl; wherein, halo is selected from fluoro, chloro, bromo or iodo.

In one embodiment of a compound of Formula (I), R₃ is hydroxy-C₁₋₈alkyl selected from hydroxy-methyl, hydroxy-ethyl, hydroxy-propyl, dihydroxy-propyl, hydroxy-butyl or dihydroxy-butyl.

In one embodiment of a compound of Formula (I), R₃ is hydroxy-C₁₋₈alkyl selected from hydroxy-methyl, dihydroxy-propyl, hydroxy-butyl or dihydroxy-butyl.

In one embodiment of a compound of Formula (I), R₃ is C₁₋₈alkoxy selected from methoxy, ethoxy, propoxy or isopropoxy.

In one embodiment of a compound of Formula (I), R₃ is halo-C₁₋₈alkoxy selected from trihalo-methoxy, dihalo-methoxy, halo-methoxy, trihalo-ethoxy, dihalo-ethoxy, halo-ethoxy, trihalo-propoxy, dihalo-propoxy or halo-propoxy; wherein, halo is selected from fluoro, chloro, bromo or iodo.

In one embodiment of a compound of Formula (I), R₃ is C₁₋₈alkoxy-carbonyl-amino selected from methoxy-carbonyl-amino, ethoxy-carbonyl-amino, propoxy-carbonyl-amino, isopropoxy-carbonyl-amino, tert-butoxy-carbonyl-amino.

In one embodiment of a compound of Formula (I), R₄ is C₃₋₁₄cycloalkyl selected from cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl; wherein, each instance of C₃₋₁₄cycloalkyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is C₃₋₈cycloalkyl selected from cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl; wherein, each instance of C₃₋₈cycloalkyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is C₃₋₁₄cycloalkyl-C₁₋₈alkyl, wherein C₃₋₁₄cycloalkyl is selected from cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl; and, wherein, each instance of C₃₋₁₄cycloalkyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is C₃₋₈cycloalkyl-C₁₋₈alkyl, wherein C₃₋₈cycloalkyl is selected from cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl; and, wherein, each instance of C₃₋₈cycloalkyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is C₃₋₁₄cycloalkyl-amino, wherein C₃₋₁₄cycloalkyl is selected from cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl; and, wherein, each instance of C₃₋₁₄cycloalkyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is C₃₋₈cycloalkyl-amino, wherein C₃₋₈cycloalkyl is selected from cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl; and, wherein, each instance of C₃₋₈cycloalkyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is aryl-C₁₋₈alkyl, aryl-C₁₋₈alkoxy-carbonyl or aryl-sulfonyloxy-C₁₋₈alkyl, wherein each instance of aryl is selected from phenyl; and, wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is aryl-C₁₋₈alkyl or aryl-C₁₋₈alkoxy-carbonyl, wherein each instance of aryl is selected from phenyl; and, wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is heterocyclyl selected from oxetanyl, pyrrolidinyl, piperidinyl, piperazinyl, 1,3-dioxanyl or morpholinyl; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is heterocyclyl selected from oxetan-3-yl, pyrrolidin-1-yl, piperidin-1-yl, piperazin-1-yl, 1,3-dioxan-5-yl or morpholin-4-yl; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is heterocyclyl-C₁₋₈alkyl, wherein each instance of heterocyclyl is selected from pyrrolidinyl or piperidinyl; and, wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₄ is heterocyclyl-C₁₋₈alkyl selected from pyrrolidin-1-yl-C₁₋₈alkyl or piperidin-1-yl-C₁₋₈alkyl; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₅ is selected from halogen, hydroxy, cyano, nitro, halo-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio.

In one embodiment of a compound of Formula (I), R₅ is hydroxy.

In one embodiment of a compound of Formula (I), R₅ is C₁₋₈alkyl selected from methyl, ethyl, propyl, isopropyl, n-butyl or tert-butyl.

In one embodiment of a compound of Formula (I), R₅ is C₁₋₈alkyl selected from ethyl, propyl, isopropyl or tert-butyl.

In one embodiment of a compound of Formula (I), R₅ is halo-C₁₋₈alkyl selected from trihalo-methyl, dihalo-methyl, halo-methyl, trihalo-ethyl, dihalo-ethyl, halo-ethyl, trihalo-propyl, dihalo-propyl or halo-propyl; wherein, halo is selected from fluoro, chloro, bromo or iodo.

In one embodiment of a compound of Formula (I), R₅ is C₁₋₈alkoxy selected from methoxy, ethoxy, propoxy or isopropoxy.

In one embodiment of a compound of Formula (I), R₅ is halo-C₁₋₈alkoxy selected from trihalo-methoxy, dihalo-methoxy, halo-methoxy, trihalo-ethoxy, dihalo-ethoxy, halo-ethoxy, trihalo-propoxy, dihalo-propoxy or halo-propoxy; wherein, halo is selected from fluoro, chloro, bromo or iodo.

In one embodiment of a compound of Formula (I), R₂ is aryl selected from phenyl; wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₂ is aryl-amino, wherein aryl is selected from phenyl; and, wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₂ is aryl-amino selected from phenyl-amino; wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₂ is aryl-amino-carbonyl, wherein aryl is selected from phenyl; wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₂ is aryl-amino-carbonyl selected from phenyl-amino-carbonyl; wherein, each instance of aryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₂ is heterocyclyl selected from 1,2,3,6-tetrahydropyridinyl, 1,3-benzodioxolyl, 3a,7a-dihydrooxazolo[4,5-b]pyridinyl or 2,3-dihydro-1,4-benzodioxinyl; wherein, each instance of heterocyclyl is optionally substituted.

In another embodiment of a compound of Formula (I), R₂ is heterocyclyl selected from 1,2,3,6-tetrahydropyridin-4-yl, 1,3-benzodioxol-5-yl or 2,3-dihydro-1,4-benzodioxin-6-yl; wherein, each instance of heterocyclyl is optionally substituted.

In one embodiment of a compound of Formula (I), R₂ is heteroaryl selected from thienyl, 1H-pyrazolyl, 1H-imidazolyl, 1,3-thiazolyl, 1,2,4-oxadiazolyl, 1,3,4-oxadiazolyl, pyridinyl, pyrimidinyl, indolyl, 1H-indazolyl, 2H-indazolyl, indolizinyl, benzofuranyl, benzothienyl, 1H-benzimidazolyl, 1,3-benzothiazolyl, 1,3-benzooxazolyl, 9H-purinyl, furo[3,2-b]pyridinyl, furo[3,2-c]pyridinyl, furo[2,3-c]pyridinyl, thieno[3,2-c]pyridinyl, thieno[2,3-d]pyrimidinyl, 1H-pyrrolo[2,3-b]pyridinyl, 1H-pyrrolo[2,3-c]pyridinyl, pyrrolo[1,2-a]pyrimidinyl, pyrrolo[1,2-a]pyrazinyl, pyrrolo[1,2-b]pyridazinyl, pyrazolo[1,5-a]pyridinyl, pyrazolo[1,5-a]pyrazinyl, imidazo[1,2-a]pyridinyl, [1,3]oxazolo[4,5-b]pyridinyl, imidazo[1,2-a]pyrimidinyl, imidazo[1,2-a]pyrimidinyl, imidazo[1,2-b]pyridazinyl, imidazo[1,2-a]pyrazinyl, imidazo[2,1-b][1,3]thiazolyl, imidazo[2,1-b][1,3,4]thiadiazolyl or quinoxalinyl; wherein, each instance of heteroaryl is optionally substituted.

In another embodiment of a compound of Formula (I), R₂ is heteroaryl selected from thien-2-yl, thien-3-yl, 1H-pyrazol-3-yl, 1H-pyrazol-4-yl, 1H-pyrazol-5-yl, 1H-imidazol-1-yl, 1H-imidazol-4-yl, 1,3-thiazol-2-yl, 1,2,4-oxadiazol-3-yl, 1,3,4-oxadiazol-2-yl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl, pyrimidin-4-yl, 1H-indol-3-yl, 1H-indol-4-yl, indol-5-yl, indol-6-yl, 1H-indazol-5-yl, 2H-indazol-5-yl, indolizin-2-yl, benzofuran-2-yl, benzothien-2-yl, benzothien-3-yl, 1H-benzimidazol-2-yl, 1H-benzimidazol-6-yl, 1,3-benzoxazol-2-yl, 1,3-benzoxazol-5-yl, 1,3-benzoxazol-6-yl, 1,3-benzothiazol-2-yl, 1,3-benzothiazol-5-yl, 1,3-benzothiazol-6-yl, 9H-purin-8-yl, furo[3,2-b]pyridin-2-yl, furo[3,2-c]pyridin-2-yl, furo[2,3-c]pyridin-2-yl, thieno[3,2-c]pyridin-2-yl, thieno[2,3-d]pyrimidin-6-yl, 1H-pyrrolo[2,3-b]pyridin-5-yl, 1H-pyrrolo[2,3-c]pyridin-4-yl, pyrrolo[1,2-a]pyrimidin-7-yl, pyrrolo[1,2-a]pyrazin-7-yl, pyrrolo[1,2-b]pyridazin-2-yl, pyrrolo[1,2-b]pyridazin-6-yl, pyrazolo[1,5-a]pyridin-2-yl, pyrazolo[1,5-a]pyrazin-2-yl, imidazo[2,1-b][1,3]thiazol-6-yl, imidazo[2,1-b][1,3,4]thiadiazol-6-yl, [1,3]oxazolo[4,5-b]pyridin-2-yl imidazo[1,2-a]pyridin-2-yl, imidazo[1,2-a]pyridin-6-yl, imidazo[1,2-a]pyrimidin-2-yl, imidazo[1,2-a]pyrimidin-6-yl, imidazo[1,2-c]pyrimidin-2-yl, imidazo[1,2-b]pyridazin-2-yl, imidazo[1,2-a]pyrazin-2-yl or quinoxalin-2-yl; wherein, each instance of heteroaryl is optionally substituted.

In another embodiment of a compound of Formula (I), R₂ is substituted heteroaryl selected from 4-methylthiophen-2-yl, 1-methyl-1H-pyrazol-3-yl, 4-methyl-1H-pyrazol-3-yl, 1-phenyl-1H-pyrazol-3-yl, 1-phenyl-1H-imidazol-4-yl, 2-methyl-1-(pyridin-2-yl)-1H-imidazol-4-yl, 4-methyl-1,3-thiazol-2-yl, 4-(trifluoromethyl)-1,3-thiazol-2-yl, 4-phenyl-1,3-thiazol-2-yl, 5-phenyl-1,2,4-oxadiazol-3-yl, 3-fluoropyridin-4-yl, 6-fluoropyridin-2-yl, 2-chloropyridin-4-yl, 4-chloropyridin-3-yl, 5-chloropyridin-2-yl, 6-methylpyridin-3-yl, 2-(trifluoromethyl)pyridin-3-yl, 4-(trifluoromethyl)pyridin-2-yl, 6-(trifluoromethyl)pyridin-2-yl, 2-methoxypyridin-4-yl, 4-methoxypyridin-3-yl, 6-methoxypyridin-2-yl, 2-ethoxypyridin-3-yl, 6-ethoxypyridin-2-yl, 6-(propan-2-yloxy)pyridin-2-yl, 6-(dimethylamino)pyridin-3-yl, 6-(methylsulfanyl)pyridin-2-yl, 6-(cyclobutyloxy)pyridin-2-yl, 6-(pyrrolidin-1-yl)pyridin-2-yl, 2-methylpyrimidin-4-yl, 2-(propan-2-yl)pyrimidin-4-yl, 2-cyclopropylpyrimidin-4-yl, 1-methyl-1H-indol-3-yl, 2-methyl-2H-indazol-5-yl, 1-methyl-1H-benzimidazol-2-yl, 4-methyl-1H-benzimidazol-2-yl 5-fluoro-1H-benzimidazol-2-yl, 4-fluoro-1,3-benzoxazol-2-yl, 5-fluoro-1,3-benzoxazol-2-yl, 4-chloro-1,3-benzoxazol-2-yl, 4-iodo-1,3-benzoxazol-2-yl, 2-methyl-1,3-benzoxazol-6-yl, 4-methyl-1,3-benzoxazol-2-yl, 4-(trifluoromethyl)-1,3-benzoxazol-2-yl, 7-(trifluoromethyl)-1,3-benzoxazol-2-yl, 4-chloro-1,3-benzothiazol-2-yl, 7-chloro-1,3-benzothiazol-2-yl, 2-methyl-1,3-benzothiazol-2-yl, 4-(trifluoromethyl)-1,3-benzothiazol-2-yl, 5-methylfuro[3,2-b]pyridin-2-yl, 4,6-dimethylfuro[3,2-c]pyridin-2-yl, 5,7-dimethylfuro[2,3-c]pyridin-2-yl, 4,6-dimethylthieno[3,2-c]pyridin-2-yl, 2,4-dimethylthieno[2,3-d]pyrimidin-6-yl, 1-methylpyrrolo[1,2-a]pyrazin-7-yl, 3-methylpyrrolo[1,2-a]pyrazin-7-yl, 1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl, 2-methylpyrrolo[1,2-b]pyridazin-6-yl, 5-methylpyrazolo[1,5-a]pyridin-2-yl, 4,6-dimethylpyrazolo[1,5-a]pyrazin-2-yl, 2-chloroimidazo[2,1-b][1,3]thiazol-6-yl, 2-methylimidazo[2,1-b][1,3]thiazol-6-yl, 3-methylimidazo[2,1-b][1,3]thiazol-6-yl, 2-ethylimidazo[2,1-b][1,3]thiazol-6-yl, 2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl, 6-cyanoimidazo[1,2-c]pyridin-2-yl (also referred to as 2-imidazo[1,2-a]pyridine-6-carbonitrile), 6-fluoroimidazo[1,2-a]pyridin-2-yl, 8-fluoroimidazo[1,2-a]pyridin-2-yl, 6,8-difluoroimidazo[1,2-a]pyridin-2-yl, 7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl, 8-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl, 6-chloroimidazo[1,2-a]pyridin-2-yl, 7-chloroimidazo[1,2-a]pyridin-2-yl, 8-chloroimidazo[1,2-a]pyridin-2-yl, 8-bromoimidazo[1,2-a]pyridin-2-yl, 2-methylimidazo[1,2-a]pyridin-2-yl, 5-methylimidazo[1,2-a]pyridin-2-yl, 6-methylimidazo[1,2-a]pyridin-2-yl, 7-methylimidazo[1,2-a]pyridin-2-yl, 8-methylimidazo[1,2-a]pyridin-2-yl, 7-ethylimidazo[1,2-a]pyridin-2-yl, 8-ethylimidazo[1,2-a]pyridin-2-yl, 6,8-dimethylimidazo[1,2-a]pyridin-2-yl, 8-ethyl-6-methylimidazo[1,2-a]pyridin-2-yl, 7-methoxyimidazo[1,2-a]pyridin-2-yl, 8-methoxyimidazo[1,2-a]pyridin-2-yl, 6-fluoro-8-methylimidazo[1,2-a]pyridin-2-yl, 8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl, 8-chloro-6-methylimidazo[1,2-a]pyridin-2-yl, 6-methyl-8-nitroimidazo[1,2-a]pyridin-2-yl, 8-cyclopropylimidazo[1,2-a]pyridin-2-yl, 2-methylimidazo[1,2-a]pyridin-6-yl, 2-ethylimidazo[1,2-a]pyridin-6-yl, 2,3-dimethylimidazo[1,2-a]pyridin-6-yl, 2,8-dimethylimidazo[1,2-a]pyridin-6-yl, 2-(trifluoromethyl)imidazo[1,2-a]pyridin-6-yl, 8-chloro-2-methylimidazo[1,2-a]pyridin-6-yl, 8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl, 6-fluoroimidazo[1,2-a]pyrimidin-2-yl, 6-chloroimidazo[1,2-a]pyrimidin-2-yl, 6-methylimidazo[1,2-a]pyrimidin-2-yl, 7-methylimidazo[1,2-a]pyrimidin-2-yl, 2-methylimidazo[1,2-a]pyrimidin-6-yl, 6-methylimidazo[1,2-b]pyridazin-2-yl, 2-methyl-3-(1,2,3,6-tetrahydropyridin-4-yl)imidazo[1,2-b]pyridazin-6-yl, 6-methylimidazo[1,2-a]pyrazin-2-yl, 8-methylimidazo[1,2-a]pyrazin-2-yl, 6,8-dimethylimidazo[1,2-c]pyrazin-2-yl, 6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl, 6-methyl-8-(trifluoromethyl)imidazo[1,2-a]pyrazin-2-yl or 8-(methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl.

In one embodiment of a compound of Formula (I), R₂ is heteroaryl-amino, wherein heteroaryl is selected from pyridinyl or pyrimidinyl; and, wherein, each instance of heteroaryl is optionally substituted.

In another embodiment of a compound of Formula (I), R₂ is heteroaryl-amino selected from pyridin-2-yl-amino, pyridin-3-yl-amino or pyrimidin-2-yl-amino; wherein, each instance of heteroaryl is optionally substituted.

In one embodiment of a compound of Formula (I), R₆ is selected from halogen, hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈ alkoxy, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio

In one embodiment of a compound of Formula (I), R₆ is C₁₋₈alkyl selected from methyl, ethyl, propyl, isopropyl or tert-butyl.

In one embodiment of a compound of Formula (I), R₆ is C₁₋₈alkyl selected from ethyl, propyl, isopropyl or tert-butyl.

In one embodiment of a compound of Formula (I), R₆ is C₂₋₈alkenyl selected from ethenyl, allyl or buta-1,3-dienyl.

In one embodiment of a compound of Formula (I), R₆ is C₂₋₈alkenyl selected from ethenyl or allyl.

In one embodiment of a compound of Formula (I), R₆ is halo-C₁₋₈alkyl selected from trihalo-methyl, dihalo-methyl, halo-methyl, trihalo-ethyl, dihalo-ethyl, halo-ethyl, trihalo-propyl, dihalo-propyl or halo-propyl; wherein, halo is selected from fluoro, chloro, bromo or iodo.

In one embodiment of a compound of Formula (I), R₆ is hydroxy-C₁₋₈alkyl selected from hydroxy-methyl, hydroxy-ethyl, hydroxy-propyl, dihydroxy-propyl, hydroxy-butyl or dihydroxy-butyl.

In one embodiment of a compound of Formula (I), R₆ is hydroxy-C₁₋₈alkyl selected from hydroxy-methyl, dihydroxy-propyl, hydroxy-butyl or dihydroxy-butyl.

In one embodiment of a compound of Formula (I), R₆ is C₁₋₈alkoxy selected from methoxy, ethoxy, propoxy or iso-propoxy.

In one embodiment of a compound of Formula (I), R₆ is halo-C₁₋₈alkoxy selected from trihalo-methoxy, dihalo-methoxy, halo-methoxy, trihalo-ethoxy, dihalo-ethoxy, halo-ethoxy, trihalo-propoxy, dihalo-propoxy or halo-propoxy; wherein, halo is selected from fluoro, chloro, bromo or iodo.

In one embodiment of a compound of Formula (I), R₇ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-oxy, aryl, heterocyclyl or heteroaryl; wherein C₃₋₁₄cycloalkyl is selected from cyclopropyl or cyclobutoxy; wherein aryl is selected from phenyl; wherein heterocyclyl is selected from pyrrolidinyl or 1,2,3,6-tetrahydropyridinyl; and, wherein heteroaryl is selected from thienyl or pyridinyl.

In one embodiment of a compound of Formula (I), R₇ is C₃₋₁₄cycloalkyl or C₃₋₁₄cycloalkyl-oxy, wherein each instance of C₃₋₁₄cycloalkyl is selected from cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl.

In one embodiment of a compound of Formula (I), R₇ is C₃₋₈cycloalkyl or C₃₋₈cycloalkyl-oxy, wherein each instance of C₃₋₈cycloalkyl is selected from cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl.

In one embodiment of a compound of Formula (I), R₇ is aryl selected from phenyl.

In one embodiment of a compound of Formula (I), R₇ is heterocyclyl selected from pyrrolidinyl or 1,2,3,6-tetrahydropyridinyl.

In one embodiment of a compound of Formula (I), R₇ is heterocyclyl selected from pyrrolidin-1-yl or 1,2,3,6-tetrahydropyridin-4-yl.

In one embodiment of a compound of Formula (I), R₇ is heteroaryl selected from thienyl or pyridinyl.

In one embodiment of a compound of Formula (I), R₇ is heteroaryl selected from pyridinyl.

In one embodiment of a compound of Formula (I), R₇ is heteroaryl selected from thien-2-yl or pyridin-2-yl.

In one embodiment of a compound of Formula (I), R₇ is heteroaryl selected from pyridin-2-yl.

In one embodiment of a compound of Formula (I), the compound is selected from Formula (Ia) or Formula (Ib):

or a form thereof, wherein all variables are as previously defined.

-   -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is selected from (methyl)₂-amino and R₂ is         benzothiazol-2-yl optionally substituted with one R₆         substituent, then R₆ is other than chloro.     -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is selected from (methyl)₂-amino or         (2-fluoro-ethyl)(methyl)amino, then R₂ is benzothiazol-2-yl         substituted with one, two or three R₆ substituents and one         additional, optional R₇ substituent.     -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is piperazin-1-yl substituted with one R₃         substituent selected from methyl, 2-fluoro-ethyl,         2-hydroxy-ethyl or 3-hydroxy-propyl; or, one R₄ substituent         selected from 3-(4-methyl-phenyl-sulfonyloxy)-propyl, then R₂ is         benzothiazol-2-yl substituted with one, two or three R₆         substituents and one additional, optional R₇ substituent.     -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is piperazin-1-yl substituted with one R₃         substituent selected from 2-fluoro-ethyl and R₂ is         imidazo[1,2-a]pyridin-2-yl optionally substituted with one R₆         substituent, then R₆ is other than chloro.     -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is (2-fluoro-ethyl)(methyl)amino and R₂ is         [1,3,4]oxadiazol-2-yl optionally substituted with one R₇         substituent, then R₇ is other than thien-2-yl.     -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is piperazin-1-yl substituted with one R₃         substituent selected from 3-fluoro-propyl and R₂ is thiazol-2-yl         optionally substituted with two R₆ substituents, then R₆ is not         simultaneously methyl and buta-1,3-dienyl.     -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is selected from methyl-amino or         (methyl)₂-amino, then R₂ is benzooxazol-2-yl substituted with         one, two or three R₆ substituents and one additional, optional         R₇ substituent.     -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is selected from (methyl)₂-amino and R₂ is         benzooxazol-2-yl optionally substituted with one R₆ substituent,         then R₆ is other than chloro.     -   In one embodiment of a compound of Formula (I), when w₁ is C—R₁,         w₂ is C—R₂ and R₁ is piperazin-1-yl substituted with one R₃         substituent selected from methyl, then R₂ is benzooxazol-2-yl         substituted with one, two or three R₆ substituents and one         additional, optional R₇ substituent.

In one embodiment of a compound of Formula (I), when w₁ is C—R₁, w₂ is C—R₂ and R₁ is selected from (methyl)₂-amino, then R₂ is 1H-benzoimidazol-2-yl substituted with one, two or three R₆ substituents and one additional, optional R₇ substituent.

In one embodiment of a compound of Formula (I), when w₁ is C—R₁, w₂ is C—R₂ and R₁ is selected from (methyl)₂-amino and R₂ is 1H-benzoimidazol-2-yl substituted with one R₆ substituent, then R₆ is other than methyl.

In certain embodiments, the compound of Formula (I) is other than:

-   3-benzothiazol-2-yl-7-[4-(2-fluoro-ethyl)-piperazin-1-yl]-chromen-2-one, -   3-benzothiazol-2-yl-7-[4-(2-hydroxy-ethyl)-piperazin-1-yl]-chromen-2-one, -   3-(6-chloro-imidazo[1,2-a]pyridin-2-yl)-7-[4-(2-fluoro-ethyl)-piperazin-1-yl]-chromen-2-one, -   3-benzothiazol-2-yl-7-(4-methyl-piperazin-1-yl)-chromen-2-one, -   3-benzothiazol-2-yl-7-[(2-fluoro-ethyl)-methyl-amino]-chromen-2-one, -   7-[(2-fluoro-ethyl)-methyl-amino]-3-(5-thiophene-2-yl-[1,3,4]oxadiazol-2-yl)-chromen-2-one, -   3-(4-buta-1,3-dienyl-5-methyl-thiazol-2-yl)-7-[4-(3-fluoro-propyl)-piperazin-1-yl]-chromen-2-one, -   toluene-4-sulfonic acid     3-[4-(3-benzothiazol-2-yl-2-oxo-2H-chromen-7-yl)-piperazin-1-yl]-propyl     ester, -   3-benzothiazol-2-yl-7-[4-(3-hydroxy-propyl)-piperazin-1-yl]-chromen-2-one, -   3-benzooxazol-2-yl-7-(4-methyl-piperazin-1-yl)-chromen-2-one, -   7-dimethylamino-3-(1-methyl-1H-benzoimidazol-2-yl)-chromen-2-one, -   3-(1H-benzoimidazol-2-yl)-7-dimethylamino-chromen-2-one, -   3-(6-chloro-benzothiazol-2-yl)-7-dimethylamino-chromen-2-one, -   3-benzothiazol-2-yl-7-dimethylamino-chromen-2-one, -   3-benzooxazol-2-yl-7-dimethylamino-chromen-2-one, -   3-benzooxazol-2-yl-7-methylamino-chromen-2-one, and -   3-(5-chloro-benzooxazol-2-yl)-7-dimethylamino-chromen-2-one.

Further provided herein are compounds of Formula (I):

or a form thereof, wherein:

-   -   w₁ and w₂ are C—R₁ or C—R₂; wherein, one of w₁ and w₂ is C—R₁         and the other is C—R₂, provided that, when w₁ is C—R₁, then w₂         is C—R₂; or, when w₁ is C—R₂, then w₂ is C—R₁;     -   R₁ is amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino,         (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino,     -   (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino, amino-C₁₋₈alkyl,         C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         amino-C₁₋₈alkyl-amino, (amino-C₁₋₈alkyl)₂-amino,         (amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino,         (C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino,         [(C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         amino-C₁₋₈alkoxy, C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy,         amino-C₂₋₈alkenyl, C₁₋₈alkyl-amino-C₂₋₈alkenyl,         (C₁₋₈alkyl)₂-amino-C₂₋₈alkenyl, amino-C₂₋₈alkynyl,         C₁₋₈alkyl-amino-C₂₋₈alkynyl, (C₁₋₈alkyl)₂-amino-C₂₋₈alkynyl,         halo-C₁₋₈alkyl-amino, (halo-C₁₋₈alkyl)₂-amino,         hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)₂-amino,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino,         (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl-amino,         [(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         [(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         heterocyclyl, heterocyclyl-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkoxy,         heterocyclyl-amino, (heterocyclyl)(C₁₋₈alkyl)amino,         heterocyclyl-amino-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkyl-amino,         (heterocyclyl-C₁₋₈alkyl)₂-amino,         (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         heterocyclyl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (heterocyclyl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         heterocyclyl-oxy, heterocyclyl-carbonyl,         heterocyclyl-carbonyl-oxy, aryl-C₁₋₈alkyl-amino,         (aryl-C₁₋₈alkyl)₂-amino, (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         aryl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (aryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, heteroaryl,         heteroaryl-C₁₋₈alkyl, heteroaryl-C₁₋₈alkoxy, heteroaryl-amino,         heteroaryl-C₁₋₈alkyl-amino, (heteroaryl-C₁₋₈alkyl)₂-amino,         (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         heteroaryl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (heteroaryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl or         (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl;     -   wherein, each instance of heterocyclyl and heteroaryl is         optionally substituted with one, two or three R₃ substituents         and one additional, optional R₄ substituent; and,     -   wherein, alternatively, each instance of heterocyclyl and         heteroaryl is optionally substituted with one, two, three or         four R₃ substituents;     -   R₂ is aryl, aryl-amino, aryl-amino-carbonyl, heterocyclyl,         heteroaryl or heteroaryl-amino;     -   wherein, each instance of aryl, heterocyclyl and heteroaryl is         optionally substituted with one, two or three R₆ substituents         and one additional, optional R₇ substituent;     -   R_(a) is, in each instance, independently selected from         hydrogen, halogen or C₁₋₈alkyl;     -   R_(b) is hydrogen, halogen, C₁₋₈alkyl or C₁₋₈alkoxy;     -   R₃ is, in each instance, independently selected from cyano,         halogen, hydroxy, oxo, C₁₋₈alkyl, halo-C₁₋₈alkyl,         C₁₋₈alkyl-carbonyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy,         C₁₋₈alkoxy-C₁₋₈alkyl, C₁₋₈alkoxy-carbonyl, amino,         C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, amino-C₁₋₈alkyl,         C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         amino-C₁₋₈alkyl-amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino,         C₁₋₈alkyl-carbonyl-amino, C₁₋₈alkoxy-carbonyl-amino,         hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)₂-amino or         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino;     -   R₄ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-C₁₋₈alkyl,         C₃₋₁₄cycloalkyl-amino, aryl-C₁₋₈alkyl, aryl-C₁₋₈alkoxy-carbonyl,         heterocyclyl or heterocyclyl-C₁₋₈alkyl; wherein, each instance         of C₃₋₁₄cycloalkyl, aryl and heterocyclyl is optionally         substituted with one, two or three R₅ substituents;     -   R₅ is, in each instance, independently selected from halogen,         hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkoxy,         halo-C₁₋₈alkoxy, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or         C₁₋₈alkyl-thio;     -   R₆ is, in each instance, independently selected from halogen,         hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, amino,         C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio; and,     -   R₇ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-oxy, aryl, heterocyclyl         or heteroaryl.     -   In one embodiment of a compound of Formula (I), R₃ is, in each         instance, independently selected from cyano, halogen, hydroxy,         oxo, C₁₋₈alkyl-carbonyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy,         C₁₋₈alkoxy-C₁₋₈alkyl, C₁₋₈alkoxy-carbonyl, amino,         C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, amino-C₁₋₈alkyl,         C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         amino-C₁₋₈alkyl-amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino,         C₁₋₈alkyl-carbonyl-amino, C₁₋₈alkoxy-carbonyl-amino,         hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl)₂-amino or         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino.     -   In one embodiment of a compound of Formula (I), R₆ is, in each         instance, independently selected from hydroxy, cyano, nitro,         halo-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈ alkoxy,         amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio.     -   In one embodiment of a compound of Formula (I), R₇ is         C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-oxy, aryl or heterocyclyl.

In one embodiment of a compound of Formula (I), the compound is selected from the group consisting of:

or a form thereof.

Terminology

The chemical terms used above and throughout the description herein, unless specifically defined otherwise, shall be understood by one of ordinary skill in the art to have the following indicated meanings.

As used herein, the term “C₁₋₈alkyl” generally refers to saturated hydrocarbon radicals having from one to eight carbon atoms in a straight or branched chain configuration, including, but not limited to, methyl, ethyl, n-propyl (also referred to as propyl or propanyl), isopropyl, n-butyl (also referred to as butyl or butanyl), isobutyl, sec-butyl, tert-butyl, n-pentyl (also referred to as pentyl or pentanyl), n-hexyl (also referred to as hexyl or hexanyl), n-heptyl (also referred to as heptyl or heptanyl), n-octyl and the like. In some embodiments, C₁₋₈alkyl includes, but is not limited to, C₁₋₆alkyl, C₁₋₄alkyl and the like. A C₁₋₈alkyl radical is optionally substituted with substituent species as described herein where allowed by available valences.

As used herein, the term “C₂₋₈alkenyl” generally refers to partially unsaturated hydrocarbon radicals having from two to eight carbon atoms in a straight or branched chain configuration and one or more carbon-carbon double bonds therein, including, but not limited to, ethenyl (also referred to as vinyl), allyl, propenyl and the like. In some embodiments, C₂₋₈alkenyl includes, but is not limited to, C₂₋₆alkenyl, C₂₋₄alkenyl and the like. A C₂₋₈alkenyl radical is optionally substituted with substituent species as described herein where allowed by available valences.

As used herein, the term “C₂₋₈alkynyl” generally refers to partially unsaturated hydrocarbon radicals having from two to eight carbon atoms in a straight or branched chain configuration and one or more carbon-carbon triple bonds therein, including, but not limited to, ethynyl, propynyl and the like. In some embodiments, C₂₋₈alkynyl includes, but is not limited to, C₂₋₆alkynyl, C₂₋₄alkynyl and the like. A C₂₋₈alkynyl radical is optionally substituted with substituent species as described herein where allowed by available valences.

As used herein, the term “C₁₋₈alkoxy” generally refers to saturated hydrocarbon radicals having from one to eight carbon atoms in a straight or branched chain configuration of the formula: —O—C₁₋₈alkyl, including, but not limited to, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, sec-butoxy, tert-butoxy, n-pentoxy, n-hexoxy and the like. In some embodiments, C₁₋₈alkoxy includes, but is not limited to, C₁₋₆alkoxy, C₁₋₄alkoxy and the like. A C₁₋₈alkoxy radical is optionally substituted with substituent species as described herein where allowed by available valences.

As used herein, the term “C₃₋₁₄cycloalkyl” generally refers to a saturated monocyclic, bicyclic or polycyclic hydrocarbon radical, including, but not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, 1H-indanyl, indenyl, tetrahydro-naphthalenyl and the like. In some embodiments, C₃₋₁₄cycloalkyl includes, but is not limited to, C₃₋₈cycloalkyl, C₅₋₈cycloalkyl, C₃₋₁₀cycloalkyl and the like. A C₃₋₁₄cycloalkyl radical is optionally substituted with substituent species as described herein where allowed by available valences.

As used herein, the term “aryl” generally refers to a monocyclic, bicyclic or polycyclic aromatic carbon atom ring structure radical, including, but not limited to, phenyl, naphthyl, anthracenyl, fluorenyl, azulenyl, phenanthrenyl and the like. An aryl radical is optionally substituted with substituent species as described herein where allowed by available valences.

As used herein, the term “heteroaryl” generally refers to a monocyclic, bicyclic or polycyclic aromatic carbon atom ring structure radical in which one or more carbon atom ring members have been replaced, where allowed by structural stability, with one or more heteroatoms, such as an O, S or N atom, including, but not limited to, furanyl (also referred to as furyl), thienyl (also referred to as thiophenyl), pyrrolyl, 2H-pyrrolyl, 3H-pyrrolyl, pyrazolyl, 1H-pyrazolyl, imidazolyl, 1H-imidazolyl, isoxazolyl, isothiazolyl, oxazolyl, 1,3-thiazolyl, triazolyl (such as 1H-1,2,3-triazolyl and the like), oxadiazolyl (such as 1,2,4-oxadiazolyl, 1,3,4-oxadiazolyl and the like), thiadiazolyl, tetrazolyl (such as 1H-tetrazolyl, 2H-tetrazolyl and the like), pyridinyl (also referred to as pyridyl), pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, indolyl, indazolyl, 1H-indazolyl, 2H-indazolyl, indolizinyl, isoindolyl, benzofuranyl, benzothienyl (also referred to as benzothiophenyl), benzoimidazolyl, 1H-benzoimidazolyl, 1,3-benzothiazolyl, 1,3-benzoxazolyl (also referred to as 1,3-benzooxazolyl), purinyl, 9H-purinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl, 1,3-diazinyl, 1,2-diazinyl, 1,2-diazolyl, 1,4-diazanaphthalenyl, acridinyl, furo[3,2-b]pyridinyl, furo[3,2-c]pyridinyl, furo[2,3-c]pyridinyl, 6H-thieno[2,3-b]pyrrolyl, thieno[3,2-c]pyridinyl, thieno[2,3-d]pyrimidinyl, 1H-pyrrolo[2,3-b]pyridinyl, 1H-pyrrolo[2,3-c]pyridinyl, 1H-pyrrolo[3,2-b]pyridinyl, pyrrolo[1,2-a]pyrimidinyl, pyrrolo[1,2-a]pyrazinyl, pyrrolo[1,2-b]pyridazinyl, pyrazolo[1,5-a]pyridinyl, pyrazolo[1,5-a]pyrazinyl, imidazo[1,2-a]pyridinyl, 3H-imidazo[4,5-b]pyridinyl, [1,3]oxazolo[4,5-b]pyridinyl, imidazo[1,2-a]pyrimidinyl, imidazo[1,2-c]pyrimidinyl, imidazo[1,2-b]pyridazinyl, imidazo[1,2-a]pyrazinyl, imidazo[2,1-b][1,3]thiazolyl, imidazo[2, 1-b][1,3,4]thiadiazolyl, [1,2,4]triazolo[1,5-a]pyridinyl, [1,2,4]triazolo[4,3-a]pyridinyl and the like. A heteroaryl radical is optionally substituted on a carbon or nitrogen atom ring member with substituent species as described herein where allowed by available valences.

As used herein, the term “heterocyclyl” generally refers to a saturated or partially unsaturated monocyclic, bicyclic or polycyclic carbon atom ring structure radical in which one or more carbon atom ring members have been replaced, where allowed by structural stability, with a heteroatom, such as an O, S or N atom, including, but not limited to, oxiranyl, oxetanyl, azetidinyl, tetrahydrofuranyl, pyrrolinyl, pyrrolidinyl, pyrazolinyl, pyrazolidinyl, imidazolinyl, imidazolidinyl, isoxazolinyl, isoxazolidinyl, isothiazolinyl, isothiazolidinyl, oxazolinyl, oxazolidinyl, thiazolinyl, thiazolidinyl, triazolinyl, triazolidinyl, oxadiazolinyl, oxadiazolidinyl, thiadiazolinyl, thiadiazolidinyl, tetrazolinyl, tetrazolidinyl, pyranyl, dihydro-2H-pyranyl, thiopyranyl, 1,3-dioxanyl, 1,2,5,6-tetrahydropyridinyl, 1,2,3,6-tetrahydropyridinyl, piperidinyl, piperazinyl, morpholinyl, thiomorpholinyl, 1,4-diazepanyl, 1,3-benzodioxolyl (also referred to as benzo[d][1,3]dioxolyl), 1,4-benzodioxanyl, 2,3-dihydro-1,4-benzodioxinyl (also referred to as 2,3-dihydrobenzo[b][1,4]dioxinyl), hexahydropyrrolo[3,4-b]pyrrol-(1H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-(1H)-yl, (3aR,6aR)-hexahydropyrrolo[3,4-b]pyrrol-(1H)-yl, hexahydropyrrolo[3,4-b]pyrrol-(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-(2H)-yl, (3aR,6aR)-hexahydropyrrolo[3,4-b]pyrrol-(2H)-yl, hexahydropyrrolo[3,4-c]pyrrol-(1H)-yl, (3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-(1H)-yl, (3aR,6aR)-hexahydropyrrolo[3,4-c]pyrrol-(1H)-yl, octahydro-5H-pyrrolo[3,2-c]pyridinyl, octahydro-6H-pyrrolo[3,4-b]pyridinyl, (4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridinyl, (4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridinyl, hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (7R,8aS)-hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (8aS)-hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (8aR)-hexahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (8aS)-octahydropyrrolo[1,2-a]pyrazin-(1H)-yl, (8aR)-octahydropyrrolo[1,2-a]pyrazin-(1H)-yl, hexahydropyrrolo[1,2-a]pyrazin-(2H)-one, octahydro-2H-pyrido[1,2-a]pyrazinyl, 3-azabicyclo[3.1.0]hexyl, (1R,5S)-3-azabicyclo[3.1.0]hexyl, 8-azabicyclo[3.2.1]octyl, (1R,5S)-8-azabicyclo[3.2.1]octyl, 8-azabicyclo[3.2.1]oct-2-enyl, (1R,5S)-8-azabicyclo[3.2.1]oct-2-enyl, 9-azabicyclo[3.3.1]nonyl, (1R,5S)-9-azabicyclo[3.3.1]nonyl, 2,5-diazabicyclo[2.2.1]heptyl, (1S,4S)-2,5-diazabicyclo[2.2.1]heptyl, 2,5-diazabicyclo[2.2.2]octyl, 3,8-diazabicyclo[3.2.1]octyl, (1R,5S)-3,8-diazabicyclo[3.2.1]octyl, 1,4-diazabicyclo[3.2.2]nonyl, azaspiro[3.3]heptyl, 8-azabicyclo[3.2.1]oct-2-enyl, 2,6-diazaspiro[3.3]heptyl, 2,7-diazaspiro[3.5]nonyl, 5,8-diazaspiro[3.5]nonyl, 2,7-diazaspiro[4.4]nonyl or 6,9-diazaspiro[4.5]decyl and the like. A heterocyclyl radical is optionally substituted on a carbon or nitrogen atom ring member with substituent species as described herein where allowed by available valences.

As used herein, the term “C₁₋₈alkoxy-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-O—C₁₋₈alkyl.

As used herein, the term “C₁₋₈alkoxy-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-O—C₁₋₈ alkyl.

As used herein, the term “(C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-O—C₁₋₈alkyl)₂.

As used herein, the term “(C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-O—C₁₋₈alkyl).

As used herein, the term “C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-NH—C₁₋₈alkyl-O—C₁₋₈alkyl.

As used herein, the term “(C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-N(C₁₋₈alkyl-O—C₁₋₈alkyl)₂.

As used herein, the term “(C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-N(C₁₋₈alkyl)(C₁₋₈alkyl-O—C₁₋₈alkyl).

As used herein, the term “C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-NH—C₁₋₈alkyl-O—C₁₋₈alkyl.

As used herein, the term “(C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl-O—C₁₋₈alkyl)₂.

As used herein, the term “(C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl)(C₁₋₈alkyl-O—C₁₋₈alkyl).

As used herein, the term “C₁₋₈alkoxy-carbonyl” refers to a radical of the formula: —C(O)—O—C₁₋₈alkyl.

As used herein, the term “C₁₋₈alkoxy-carbonyl-amino” refers to a radical of the formula: —NH—C(O)—O—C₁₋₈alkyl.

As used herein, the term “C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl.

As used herein, the term “(C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl)₂.

As used herein, the term “C₁₋₈alkyl-amino-C₂₋₈alkenyl” refers to a radical of the formula: —C₂₋₈alkenyl-NH—C₁₋₈alkyl.

As used herein, the term “(C₁₋₈alkyl)₂-amino-C₂₋₈alkenyl” refers to a radical of the formula: —C₂₋₈alkenyl-N(C₁₋₈alkyl)₂.

As used herein, the term “C₁₋₈alkyl-amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-NH—C₁₋₈alkyl.

As used herein, the term “(C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-N(C₁₋₈alkyl)₂.

As used herein, the term “C₁₋₈alkyl-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-NH—C₁₋₈alkyl.

As used herein, the term “(C₁₋₈alkyl)₂-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl)₂.

As used herein, the term “C₁₋₈alkyl-amino-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-NH—C₁₋₈alkyl.

As used herein, the term “(C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-N(C₁₋₈alkyl)₂.

As used herein, the term “(C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-NH—C₁₋₈alkyl)₂.

As used herein, the term “(C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-NH—C₁₋₈alkyl).

As used herein, the term “[(C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl) [C₁₋₈alkyl-N(C₁₋₈alkyl)₂].

As used herein, the term “C₁₋₈alkyl-amino-C₂₋₈alkynyl” refers to a radical of the formula: —C₂₋₈alkynyl-NH—C₁₋₈alkyl.

As used herein, the term “(C₁₋₈alkyl)₂-amino-C₂₋₈alkynyl” refers to a radical of the formula: —C₂₋₈alkynyl-N(C₁₋₈alkyl)₂.

As used herein, the term “C₁₋₈alkyl-carbonyl” refers to a radical of the formula: —C(O)—C₁₋₈alkyl.

As used herein, the term “C₁₋₈alkyl-carbonyl-amino” refers to a radical of the formula: —NH—C(O)—C₁₋₈alkyl.

As used herein, the term “C₁₋₈alkyl-thio” refers to a radical of the formula: —S—C₁₋₈alkyl.

As used herein, the term “amino-C₂₋₈alkenyl” refers to a radical of the formula: —C₂₋₈alkenyl-NH₂.

As used herein, the term “amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-NH₂.

As used herein, the term “amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-NH₂.

As used herein, the term “amino-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-NH₂.

As used herein, the term “(amino-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-NH₂)₂.

As used herein, the term “(amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-NH₂).

As used herein, the term “amino-C₂₋₈alkynyl” refers to a radical of the formula: —C₂₋₈alkynyl-NH₂.

As used herein, the term “aryl-C₁₋₈alkoxy-carbonyl” refers to a radical of the formula: —C(O)—O—C₁₋₈alkyl-aryl.

As used herein, the term “aryl-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-aryl.

As used herein, the term “aryl-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-aryl.

As used herein, the term “(aryl-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-aryl)₂.

As used herein, the term “(aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-aryl).

As used herein, the term “aryl-C₁₋₈alkyl-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-NH—C₁₋₈alkyl-aryl.

As used herein, the term “(aryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl-aryl)₂.

As used herein, the term “(aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl)(C₁₋₈alkyl-aryl).

As used herein, the term “aryl-amino” refers to a radical of the formula: —NH-aryl.

As used herein, the term “aryl-amino-carbonyl” refers to a radical of the formula: —C(O)—NH-aryl.

As used herein, the term “aryl-sulfonyloxy-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-O—SO₂-aryl.

As used herein, the term “benzoxy-carbonyl” refers to a radical of the formula: —C(O)O—CH₂-phenyl.

As used herein, the term “C₃₋₁₄cycloalkyl-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-C₃₋₁₄cycloalkyl.

As used herein, the term “C₃₋₁₄cycloalkyl-amino” refers to a radical of the formula: —NH—C₃₋₁₄cycloalkyl.

As used herein, the term “C₃₋₁₄cycloalkyl-oxy” refers to a radical of the formula: —O—C₃₋₁₄cycloalkyl.

As used herein, the term “halo” or “halogen” generally refers to a halogen atom radical, including fluoro, chloro, bromo and iodo.

As used herein, the term “halo-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-halo, wherein C₁₋₈alkyl is partially or completely substituted with one or more halogen atoms where allowed by available valences.

As used herein, the term “halo-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-halo, wherein C₁₋₈alkyl is partially or completely substituted with one or more halogen atoms where allowed by available valences.

As used herein, the term “halo-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-halo.

As used herein, the term “(halo-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-halo).

As used herein, the term “(halo-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-halo)₂.

As used herein, the term “heteroaryl-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-heteroaryl.

As used herein, the term “heteroaryl-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-heteroaryl.

As used herein, the term “heteroaryl-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-heteroaryl.

As used herein, the term “(heteroaryl-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-heteroaryl)₂.

As used herein, the term “(heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-heteroaryl).

As used herein, the term “heteroaryl-C₁₋₈alkyl-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-NH—C₁₋₈alkyl-heteroaryl.

As used herein, the term “(heteroaryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl-heteroaryl)₂.

As used herein, the term “(heteroaryl-C₁₋₈alkyl(C₁₋₈alkyl)amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl)(C₁₋₈alkyl-heteroaryl).

As used herein, the term “heteroaryl-amino” refers to a radical of the formula: —NH-heteroaryl.

As used herein, the term “heterocyclyl-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-heterocyclyl.

As used herein, the term “heterocyclyl-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-heterocyclyl.

As used herein, the term “(heterocyclyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(heterocyclyl).

As used herein, the term “heterocyclyl-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-heterocyclyl.

As used herein, the term “(heterocyclyl-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-heterocyclyl)₂.

As used herein, the term “(heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-heterocyclyl).

As used herein, the term “heterocyclyl-C₁₋₈alkyl-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-NH—C₁₋₈alkyl-heterocyclyl.

As used herein, the term “(heterocyclyl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl-heterocyclyl)₂.

As used herein, the term “(heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl)(C₁₋₈alkyl-heterocyclyl).

As used herein, the term “heterocyclyl-amino” refers to a radical of the formula: —NH-heterocyclyl.

As used herein, the term “heterocyclyl-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-NH-heterocyclyl.

As used herein, the term “heterocyclyl-carbonyl” refers to a radical of the formula: —C(O)-heterocyclyl.

As used herein, the term “heterocyclyl-carbonyl-oxy” refers to a radical of the formula: —O—C(O)-heterocyclyl.

As used herein, the term “heterocyclyl-oxy” refers to a radical of the formula: —O-heterocyclyl.

As used herein, the term “hydroxy” refers to a radical of the formula: —OH.

As used herein, the term “hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-O—C₁₋₈alkyl-OH.

As used herein, the term “hydroxy-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-OH, wherein C₁₋₈alkyl is partially or completely substituted with one or more hydroxy radicals where allowed by available valences.

As used herein, the term “(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-OH).

As used herein, the term “hydroxy-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-OH.

As used herein, the term “(hydroxy-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-OH)₂.

As used herein, the term “hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-NH—C₁₋₈alkyl-OH.

As used herein, the term “(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl)(C₁₋₈alkyl-OH).

As used herein, the term “(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl” refers to a radical of the formula: —C₁₋₈alkyl-N(C₁₋₈alkyl-OH)₂.

As used herein, the term “hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-NH—C₁₋₈alkyl-OH.

As used herein, the term “(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-N(C₁₋₈alkyl)(C₁₋₈alkyl-OH).

As used herein, the term “(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy” refers to a radical of the formula: —O—C₁₋₈alkyl-N(C₁₋₈alkyl-OH)₂.

As used herein, the term “hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-NH—C₁₋₈alkyl-OH.

As used herein, the term “(hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino” refers to a radical of the formula: —N(C₁₋₈alkyl-NH—C₁₋₈alkyl-OH)₂.

As used herein, the term “(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-N(C₁₋₈alkyl-OH)₂.

As used herein, the term “(hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)(C₁₋₈alkyl-NH—C₁₋₈alkyl-OH).

As used herein, the term “[(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)[C₁₋₈alkyl-N(C₁₋₈alkyl-OH)₂].

As used herein, the term “(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl-amino” refers to a radical of the formula: —NH—C₁₋₈alkyl-N(C₁₋₈alkyl,C₁₋₈alkyl-OH).

As used herein, the term “[(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl](C₁₋₈alkyl)amino” refers to a radical of the formula: —N(C₁₋₈alkyl)[C₁₋₈alkyl-N(C₁₋₈alkyl)(C₁₋₈alkyl-OH)].

As used herein, the term “substituent” means positional variables on the atoms of a core molecule that are attached at a designated atom position, replacing one or more hydrogen atoms on the designated atom, provided that the atom of attachment does not exceed the available valence or shared valences, such that the substitution results in a stable compound. Accordingly, combinations of substituents and/or variables are permissible only if such combinations result in stable compounds. It should also be noted that any carbon as well as heteroatom with a valence level that appears to be unsatisfied as described or shown herein is assumed to have a sufficient number of hydrogen atom(s) to satisfy the valences described or shown.

For the purposes of this description, where one or more substituent variables for a compound of Formula (I) encompass functionalities incorporated into a compound of Formula (I), each functionality appearing at any location within the disclosed compound may be independently selected, and as appropriate, independently and/or optionally substituted.

As used herein, the terms “independently selected,” or “each selected” refer to functional variables in a substituent list that may be attached more than once on the structure of a core molecule, where the pattern of substitution at each occurrence is independent of the pattern at any other occurrence. Further, the use of a generic substituent on a core structure for a compound provided herein is understood to include the replacement of the generic substituent with specie substituents that are included within the particular genus, e.g., aryl may be independently replaced with phenyl or naphthalenyl (also referred to as naphthyl) and the like, such that the resulting compound is to be included within the scope of the compounds described herein.

As used herein, the term “each instance of” when used in a phrase such as “. . . aryl, aryl-C₁₋₈alkyl, heterocyclyl and heterocyclyl-C₁₋₈alkyl, wherein each instance of aryl and heterocyclyl is optionally substituted with one or two substituents . . . ” is intended to include optional, independent substitution on each of the aryl and heterocyclyl rings and on the aryl and heterocyclyl portions of aryl-C₁₋₈alkyl and heterocyclyl-C₁₋₈alkyl.

As used herein, the term “optionally substituted” means that the specified substituent variables, groups, radicals or moieties represent the scope of the genus and may be independently chosen as needed to replace one or more hydrogen atoms on the designated atom of attachment of a core molecule.

As used herein, the terms “stable compound” or “stable structure” mean a compound that is sufficiently robust to be isolated to a useful degree of purity from a reaction mixture and formulations thereof into an efficacious therapeutic agent.

Compound names provided herein were obtained using ACD Labs Index Name software provided by ACD Labs and/or ChemDraw Ultra software provided by Cambridge-Soft®. When the compound name disclosed herein conflicts with the structure depicted, the structure shown will supercede the use of the name to define the compound intended. Nomenclature for substituent radicals defined herein may differ slightly from the chemical name from which they are derived; one skilled in the art will recognize that the definition of the substituent radical is intended to include the radical as found in the chemical name.

The term “SMN,” unless otherwise specified herein, refers to the human SMN1 gene, DNA or RNA, and/or human SMN2 gene, DNA or RNA. In a specific embodiment, the term “SMN1” refers to the human SMN1 gene, DNA or RNA. In another specific embodiment, the term “SMN2” refers to the human SMN2 gene, DNA or RNA.

Nucleic acid sequences for the human SMN1 and SMN2 genes are known in the art. For nucleic acid sequences of human SMN1, see, e.g., GenBank Accession Nos. DQ894095, NM_000344, NM_022874, and BC062723. For nucleic acid sequences of human SMN2, see, e.g., NM_022875, NM_022876, NM_022877, NM_017411, DQ894734 (Life Technologies, Inc. (formerly Invitrogen), Carlsbad, Calif.), BC000908, BC070242, CR595484, CR598529, CR609539, U21914, and BC015308.

The SMN1 gene can be found on the forward strand of human chromosome 5 from approximately nucleotide 70,220,768 to approximately nucleotide 70,249,769. The approximate locations of exons 6, 7 and 8 and introns 6 and 7 of SMN1 on human chromosome 5 are as follows:

70,241,893 to 70,242,003 exon 6;

70,242,004 to 70,247,767 intron 6;

70,247,768 to 70,247,821 exon 7;

70,247,822 to 70,248,265 intron 7; and,

70,248,266 to 70,248,839 exon 8.

The SMN2 gene can be found on the forward strand of human chromosome 5 from approximately nucleotide 69,345,350 to approximately nucleotide 69,374,349.

The approximate locations of exons 6, 7 and 8 and introns 6 and 7 of SMN2 on human chromosome 5 are as follows:

69,366,468 to 69,366,578 exon 6;

69,366,579 to 69,372,347 intron 6;

69,372,348 to 69,372,401 exon 7;

69,372,402 to 69,372,845 intron 7; and,

69,372,846 to 69,373,419 exon 8.

In specific embodiments, the nucleotide sequences delineated above for exons 6, 7 and 8 and introns 6 and 7 of SMN1 are used in the SMN1 minigene nucleic acid constructs described herein. In other specific embodiments, the nucleotide sequences of exons 6, 7 and 8 and introns 6 and 7 of SMN2 in the examples provided herein are used in the SMN2 minigene nucleic acid constructs described herein.

The term “Smn” or “Smn protein,” unless otherwise specified herein, refers to a human Smn protein that contains the amino acid residues encoded by exons 1 through 7 of the SMN1 gene and/or SMN2 gene. In a specific embodiment, the Smn protein is stable and functional in vitro and/or in vivo as assessed by methods known to one of skill in the art. In another specific embodiment, the Smn protein is the full-length protein encoded by the human SMN1 gene and/or SMN2 gene. In another specific embodiment, the Smn protein has the amino acid sequence found at GenBank Accession No. NP_000335, AAC50473.1, AAA66242.1, or NP_059107.

As used herein, the term “enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene,” and analogous terms, unless otherwise specified herein, refers to the inclusion of the complete, intact, non-truncated sequence of exon 7 of SMN2 into the mature mRNA that is transcribed from the SMN2 gene (i.e., resulting in the production of full-length SMN2 mRNA) in vitro and/or in vivo, as assessed by methods known to one of skill in the art, such that increased levels of Smn protein are produced from the SMN2 gene in vitro and/or in vivo, as assessed by methods known to one of skill in the art; or, that increased expression of stable and functional Smn protein is produced from the SMN2 gene in vitro and/or in vivo, as assessed by methods known to one of skill in the art; or, that expression of the fusion protein encoded by the minigene is increased in vitro, as assessed by methods known to one of skill in the art; or, that expression of Smn protein produced from the SMN2 gene in a subject (e.g., an animal model for SMA or a human subject) in need thereof is increased.

As used herein, the term “enhances the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene,” and analogous terms, unless otherwise specified herein, refers to the inclusion of the complete, intact, non-truncated sequence of exon 7 of SMN1 into the mature mRNA that is transcribed from the SMN1 gene (i.e., resulting in the production of full-length SMN1 mRNA) in vitro and/or in vivo, as assessed by methods known to one of skill in the art, such that increased levels of Smn protein are produced from the SMN1 gene in vitro and/or in vivo, as assessed by methods known to one of skill in the art; or, that increased expression of stable and functional Smn protein is produced from the SMN1 gene in vitro and/or in vivo, as assessed by methods known to one of skill in the art; or, that expression of the fusion protein encoded by the minigene is increased in vitro, as assessed by methods known to one of skill in the art; or, that expression of Smn protein produced from the SMN1 gene in a subject (e.g., an animal model for SMA or a human subject) in need thereof is increased.

As used herein, the term “substantial change” in the context of the amount of mRNA means that the amount of mRNA changes by a statistically significant amount, e.g., a p value less than a value selected from 0.1, 0.05, 0.01, 0.005, 0.001, 0.0005, 0.0001, 0.00005 or 0.00001.

As used herein, the terms “subject” and “patient” are used interchangeably to refer to an animal or any living organism having sensation and the power of voluntary movement, and which requires for its existence oxygen and organic food. Nonlimiting examples include members of the human, equine, porcine, bovine, rattus, murine, canine and feline species. In some embodiments, the subject is a mammal or a warm-blooded vertebrate animal. In certain embodiments, the subject is a non-human animal. In specific embodiments, the subject is a human.

As used herein, the term “elderly human” refers to a human 65 years old or older.

As used herein, the term “human adult” refers to a human that is 18 years or older.

As used herein, the term “human child” refers to a human that is 1 year to 18 years old.

As used herein, the term “human infant” refers to a newborn to 1 year old year human.

As used herein, the term “human toddler” refers to a human that is 1 year to 3 years old.

Compound Forms

As used herein, the terms “a compound of Formula (Ia)” and “a compound of Formula (Ib)” refer to sub-genuses of the compound of Formula (I) or a form thereof and are defined herein. Rather than repeat embodiments for a compound of Formula (Ia) or a compound of Formula (Ib), in certain embodiments, the term “a compound(s) of Formula (I) or a form thereof” is used to refer to either a compound of Formula (Ia) or a form thereof, a compound of Formula (Ib) or a form thereof, or both. Thus, embodiments and references to “a compound of Formula (I)” are intended to include compounds of Formula (Ia) and Formula (Ib).

As used herein, the term “form” means a compound of Formula (I) selected from a free acid, free base, salt, isotopologue, stereoisomer, racemate, enantiomer, diastereomer, or tautomer thereof.

In certain embodiments described herein, the form of the compound of Formula (I) is a selected from a salt, isotopologue, stereoisomer, racemate, enantiomer, diastereomer or tautomer thereof.

In certain embodiments described herein, the form of the compound of Formula (I) is a selected from a free acid, isotopologue, stereoisomer, racemate, enantiomer, diastereomer or tautomer thereof

In certain embodiments described herein, the form of the compound of Formula (I) is a selected from a free base, isotopologue, stereoisomer, racemate, enantiomer, diastereomer or tautomer thereof.

In certain embodiments described herein, the form of the compound of Formula (I) is a free acid, free base or salt thereof.

In certain embodiments described herein, the form of the compound of Formula (I) is an isotopologue thereof.

In certain embodiments described herein, the form of the compound of Formula (I) is a stereoisomer, racemate, enantiomer or diastereomer thereof.

In certain embodiments described herein, the form of the compound of Formula (I) is a tautomer thereof.

In certain embodiments described herein, the form of the compound of Formula (I) is a pharmaceutically acceptable form.

In certain embodiments described herein, the compound of Formula (I) or a form thereof is isolated for use.

As used herein, the term “isolated” means the physical state of a compound of Formula (I) or a form thereof after being isolated and/or purified from a synthetic process (e.g., from a reaction mixture) or natural source or combination thereof according to an isolation or purification process or processes described herein or which are well known to the skilled artisan (e.g., chromatography, recrystallization and the like) in sufficient purity to be characterizable by standard analytical techniques described herein or well known to the skilled artisan.

As used herein, the term “protected” means that a functional group on a compound of Formula (I) is in a form modified to preclude undesired side reactions at the protected site when the compound is subjected to a reaction. Suitable protecting groups will be recognized by those with ordinary skill in the art as well as by reference to standard textbooks such as, for example, T. W. Greene et al, Protective Groups in Organic Synthesis (1991), Wiley, New York.

Prodrugs of a compound of Formula (I) or a form thereof are also contemplated herein.

As used herein, the term “prodrug” means that a functional group on a compound of Formula (I) is in a form (e.g., acting as an active or inactive drug precursor) that is transformed in vivo to yield an active or more active compound of Formula (I) or a form thereof. The transformation may occur by various mechanisms (e.g., by metabolic and/or non-metabolic chemical processes), such as, for example, by hydrolysis and/or metabolism in blood, liver and/or other organs and tissues. A discussion of the use of prodrugs is provided by V. J. Stella, et. al., “Biotechnology: Pharmaceutical Aspects, Prodrugs: Challenges and Rewards,” American Association of Pharmaceutical Scientists and Springer Press, 2007.

In one example, when a compound of Formula (I) or a form thereof contains a carboxylic acid functional group, a prodrug can comprise an ester formed by the replacement of the hydrogen atom of the acid group with a functional group such as alkyl and the like. In another example, when a compound of Formula (I) or a form thereof contains an alcohol functional group, a prodrug can be formed by the replacement of the hydrogen atom of the alcohol group with a functional group such as alkyl or substituted carbonyl and the like. In another example, when a compound of Formula (I) or a form thereof contains an amine functional group, a prodrug can be formed by the replacement of one or more amine hydrogen atoms with a functional group such as alkyl or substituted carbonyl. In another example, when a compound of Formula (I) or a form thereof contains a hydrogen substituent, a prodrug can be formed by the replacement of one or more hydrogen atoms with an alkyl substituent.

Pharmaceutically acceptable prodrugs of compounds of Formula (I) or a form thereof include those compounds substituted with one or more of the following groups: carboxylic acid esters, sulfonate esters, amino acid esters phosphonate esters, mono-, di- or triphosphate esters or alkyl substituents where appropriate. As described herein, it is understood by a person of ordinary skill in the art that one or more of such substituents may be used to provide a compound of Formula (I) or a form thereof for use as a prodrug.

One or more compounds described herein may exist in unsolvated as well as solvated forms with pharmaceutically acceptable solvents such as water, ethanol, and the like, and the description herein is intended to embrace both solvated and unsolvated forms.

As used herein, the term “solvate” means a physical association of a compound described herein with one or more solvent molecules. This physical association involves varying degrees of ionic and covalent bonding, including hydrogen bonding. In certain instances the solvate will be capable of isolation, for example when one or more solvent molecules are incorporated in the crystal lattice of the crystalline solid. As used herein, “solvate” encompasses both solution-phase and isolatable solvates. Non-limiting examples of suitable solvates include ethanolates, methanolates, and the like.

One or more compounds described herein may optionally be converted to a solvate. Preparation of solvates is generally known. A typical, non-limiting process involves dissolving a compound in a desired amount of the desired solvent (organic or water or mixtures thereof) at a higher than ambient temperature, and cooling the solution at a rate sufficient to form crystals which are then isolated by standard methods. Analytical techniques such as, for example infrared spectroscopy, show the presence of the solvent (or water) in the crystals as a solvate (or hydrate).

As used herein, the term “hydrate” means a solvate wherein the solvent molecule is water.

The compounds of Formula (I) can form salts which are intended to be included within the scope of this description. Reference to a compound of Formula (I) herein is understood to include reference to salts thereof, unless otherwise indicated. The term “salt(s)”, as employed herein, denotes acidic salts formed with inorganic and/or organic acids, as well as basic salts formed with inorganic and/or organic bases. In addition, when a compound of Formula (I) contains both a basic moiety, such as, but not limited to a pyridine or imidazole, and an acidic moiety, such as, but not limited to a carboxylic acid, zwitterions (“inner salts”) may be formed and are included within the term “salt(s)” as used herein.

The term “pharmaceutically acceptable salt(s)”, as used herein, means those salts of compounds described herein that are safe and effective (i.e., non-toxic, physiologically acceptable) for use in mammals and that possess biological activity, although other salts are also useful. Salts of the compounds of Formula (I) may be formed, for example, by reacting a compound of Formula (I) with an amount of acid or base, such as an equivalent or stoichiometric amount, in a medium such as one in which the salt precipitates or in an aqueous medium followed by lyophilization.

Pharmaceutically acceptable salts include one or more salts of acidic or basic groups present in compounds described herein. Embodiments of acid addition salts include, and are not limited to, acetate, acid phosphate, ascorbate, benzoate, benzenesulfonate, bisulfate, bitartrate, borate, butyrate, chloride, citrate, camphorate, camphorsulfonate, ethanesulfonate, formate, fumarate, gentisinate, gluconate, glucaronate, glutamate, hydrobromide, hydrochloride, dihydrochloride, hydroiodide, isonicotinate, lactate, maleate, methanesulfonate, naphthalenesulfonate, nitrate, oxalate, pamoate, pantothenate, phosphate, propionate, saccharate, salicylate, succinate, sulfate, tartrate, thiocyanate, toluenesulfonate (also known as tosylate), trifluoroacetate salts and the like. Certain embodiments of mono-acid, di-acid or tri-acid addition salts include a chloride, hydrochloride, dihydrochloride, trihydrochloride, hydrobromide, acetate, diacetate or trifluoroacetate salt. More particular embodiments include a chloride, hydrochloride, dihydrochloride, hydrobromide or trifluoroacetate salt.

Additionally, acids which are generally considered suitable for the formation of pharmaceutically useful salts from basic pharmaceutical compounds are discussed, for example, by P. Stahl et al, Camille G. (eds.) Handbook of Pharmaceutical Salts. Properties, Selection and Use. (2002) Zurich: Wiley-VCH; S. Berge et al, Journal of Pharmaceutical Sciences (1977) 66(1) 1-19; P. Gould, International J. of Pharmaceutics (1986) 33, 201-217; Anderson et al, The Practice of Medicinal Chemistry (1996), Academic Press, New York; and in The Orange Book (Food & Drug Administration, Washington, D.C. on their website). These disclosures are incorporated herein by reference thereto.

Suitable basic salts include, but are not limited to, aluminum, ammonium, calcium, lithium, magnesium, potassium, sodium, zinc, and diethanolamine salts. Certain compounds described herein can also form pharmaceutically acceptable salts with organic bases (for example, organic amines) such as, but not limited to, dicyclohexylamines, tert-butyl amines and the like, and with various amino acids such as, but not limited to, arginine, lysine and the like. Basic nitrogen-containing groups may be quarternized with agents such as lower alkyl halides (e.g., methyl, ethyl, and butyl chlorides, bromides and iodides), dialkyl sulfates (e.g., dimethyl, diethyl, and dibutyl sulfates), long chain halides (e.g., decyl, lauryl, and stearyl chlorides, bromides and iodides), aralkyl halides (e.g., benzyl and phenethyl bromides), and others.

All such acid salts and base salts are intended to be pharmaceutically acceptable salts within the scope of the description herein and all acid and base salts are considered equivalent to the free forms of the corresponding compounds for the purposes described herein.

Compounds of Formula I and forms thereof may further exist in a tautomeric form (for example, as a keto or enol form such as an embedded enone system). All such tautomeric forms are contemplated herein as part of the present description.

The compounds of Formula (I) may contain asymmetric or chiral centers, and, therefore, may exist in different stereoisomeric forms. The present description is intended to include all stereoisomeric forms of the compounds of Formula (I) as well as mixtures thereof, including racemic mixtures.

The compounds of Formula (I) described herein may include one or more chiral centers, and as such may exist as racemic mixtures (R/S) or as substantially pure enantiomers and diastereomers. The compounds may also exist as substantially pure (R) or (S) enantiomers (when one chiral center is present). In one embodiment, the compounds of Formula (I) described herein are (S) isomers and may exist as enantiomerically pure compositions substantially comprising only the (S) isomer. In another embodiment, the compounds of Formula (I) described herein are (R) isomers and may exist as enantiomerically pure compositions substantially comprising only the (R) isomer. As one of skill in the art will recognize, when more than one chiral center is present, the compounds of Formula (I) described herein may also include portions described as an (R,R), (R,S), (S,R) or (S,S) isomer, as defined by IUPAC Nomenclature Recommendations.

As used herein, the term “substantially pure” refers to compounds consisting substantially of a single isomer in an amount greater than or equal to 90%, in an amount greater than or equal to 92%, in an amount greater than or equal to 95%, in an amount greater than or equal to 98%, in an amount greater than or equal to 99%, or in an amount equal to 100% of the single isomer.

In one aspect, a compound of Formula (I) is a substantially pure (S) enantiomer present in an amount greater than or equal to 90%, in an amount greater than or equal to 92%, in an amount greater than or equal to 95%, in an amount greater than or equal to 98%, in an amount greater than or equal to 99%, or in an amount equal to 100%.

In one aspect, a compound of Formula (I) is a substantially pure (R) enantiomer present in an amount greater than or equal to 90%, in an amount greater than or equal to 92%, in an amount greater than or equal to 95%, in an amount greater than or equal to 98%, in an amount greater than or equal to 99%, or in an amount equal to 100%.

As used herein, a “racemate” is any mixture of isometric forms that are not “enantiomerically pure”, including mixtures such as, without limitation, in a ratio of about 50/50, about 60/40, about 70/30, about 80/20, about 85/15 or about 90/10.

In addition, the present description embraces all geometric and positional isomers. For example, if a compound of Formula (I) incorporates a double bond or a fused ring, both the cis- and trans-forms, as well as mixtures, are embraced within the scope of the description herein.

Diastereomeric mixtures can be separated into their individual diastereomers on the basis of their physical chemical differences by methods well known to those skilled in the art, such as, for example, by chromatography and/or fractional crystallization. Enantiomers can be separated by use of chiral HPLC column or other chromatographic methods known to those skilled in the art.

Enantiomers can also be separated by converting the enantiomeric mixture into a diastereomeric mixture by reaction with an appropriate optically active compound (e.g., chiral auxiliary such as a chiral alcohol or Mosher's acid chloride), separating the diastereomers and converting (e.g., hydrolyzing) the individual diastereomers to the corresponding pure enantiomers. Also, some of the compounds of Formula (I) may be atropisomers (e.g., substituted biaryls) and are considered part of this description.

It is also possible that the compounds of Formula (I) may exist in different tautomeric forms, and all such forms are embraced within the scope of this description. Accordingly, all keto-enol and imine-enamine forms of a compound of Formula (I) are included in the description herein.

All stereoisomer forms (for example, geometric isomers, optical isomers, positional isomers and the like) of the present compounds (including salts, solvates, esters and prodrugs and transformed prodrugs thereof) which may exist due to asymmetric carbons on various substituents, including enantiomeric forms (which may exist even in the absence of asymmetric carbons), rotameric forms, atropisomers, diastereomeric forms and regioisomeric forms are contemplated within the scope of the description herein. For example, if a compound of Formula (I) incorporates a double bond or a fused ring, both the cis- and trans-forms, as well as mixtures thereof, are embraced within the scope of the description herein. Also, for example, all keto-enol and imine-enamine tautomeric forms of the compounds are included in the description herein. Individual stereoisomers of the compounds of Formula (I) described herein may, for example, be substantially free of other isomers, or may be present in a racemic mixture, as described supra.

The use of the terms “salt,” “prodrug” and “transformed prodrug” are intended to equally apply to the salts, prodrugs and transformed prodrugs of all contemplated isotopologues, stereoisomers, racemates or tautomers of the instant compounds.

The term “isotopologue” refers to isotopically-enriched compounds which are identical to those recited herein, but for the fact that one or more atoms are replaced by an atom having an atomic mass or mass number different from the atomic mass or mass number usually found in nature. Examples of isotopes that can be incorporated into compounds described herein include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorus, fluorine and chlorine, such as H², H³, C¹³, C¹⁴, N¹⁵, O¹⁸, O¹⁷, P³¹, P³², S³⁵, F¹⁸, Cl³⁵ and Cl³⁶, respectively, each of which is also within the scope of this description.

Certain isotopically-enriched compounds described herein (e.g., those labeled with H³ and C¹⁴) are useful in compound and/or substrate tissue distribution assays. Tritiated (i.e., H³) and carbon-14 (i.e., C¹⁴) isotopes are particularly preferred for their ease of preparation and detectability. Further, substitution with heavier isotopes such as deuterium (i.e., H²) may afford certain therapeutic advantages resulting from greater metabolic stability (e.g., increased in vivo half-life or reduced dosage requirements) and hence may be preferred in some circumstances. Isotopically-enriched compounds of Formula (I) can generally be prepared using procedures known to persons of ordinary skill in the art by substituting an appropriate isotopically-enriched reagent for a non-isotopically-enriched reagent.

When the compounds are enriched with deuterium, the deuterium-to-hydrogen ratio in the deuterated areas of the molecules substantially exceeds the naturally occurring deuterium-to-hydrogen ratio.

An embodiment described herein may include a compound of Formula (I) and forms thereof, wherein the isotopologue is deuterium.

An embodiment described herein may include a compound of Formula (I) and forms thereof, wherein a carbon atom may have from 1 to 3 hydrogen atoms optionally replaced with deuterium.

Polymorphic crystalline and amorphous forms of the compounds of Formula (I), and of the salts, solvates, esters and prodrugs of the compounds of Formula (I), are further intended to be included in the scope of the compounds described herein.

Compound Uses

Compounds of Formula (I) or a form thereof that enhance inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene are described herein. Such compounds of Formula (I) or a form thereof have been shown to enhance the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene using the assays described herein (see Biological example section, infra). Accordingly, compounds of Formula (I) or a form thereof have utility as enhancers for the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene.

Compounds of Formula (I) or a form thereof for enhancing inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene are described herein. Such compounds of Formula (I) or a form thereof may enhance inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene using, e.g., an SMN1 minigene assay. Accordingly, compounds of Formula (I) or a form thereof may have utility as enhancers for the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene.

In one aspect, provided herein are methods for modulating the inclusion of exon 7 of SMN2 into RNA transcribed from the SMN2 gene, comprising contacting a A method for enhancing the inclusion of exon 7 of SMN2 into mRNA transcribed from the SMN2 gene, comprising contacting a human cell with a compound of Formula (I) or a form thereof. In a specific embodiment, provided herein are methods for modulating the inclusion of exon 7 of SMN2 into RNA transcribed from the SMN2 gene, comprising contacting a human cell with a compound of Formula (I) or a form thereof that modulates the expression of an SMN2 minigene described herein or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety. In one embodiment, the minigene is a minigene described in the Examples of International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833. In another embodiment, the minigene is the minigene described in Biological Example 1, infra. The human cell can be contacted with a compound of Formula (I) or a form thereof in vitro, in a non-human animal or in a human. In a specific embodiment, the human cell is in a human. In another specific embodiment, the human cell is in a human SMA patient. In another specific embodiment, the human cell is in a human SMA patient, wherein SMA is caused by an inactivating mutation or deletion in the SMN1 gene on both chromosomes, resulting in a loss of SMN1 gene function. In another embodiment, the human cell is a human cell from a human SMA patient. In certain embodiments, the human cell is from a cell line, such as GM03813, GM00232, GM09677, and/or GM23240 (available from Coriell Institute).

In a specific embodiment, provided herein is a method for enhancing the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, comprising contacting a human cell with a compound of Formula (I) or a form thereof. In another embodiment, provided herein is a method for enhancing the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, comprising contacting a human cell with a compound of Formula (I) or a form thereof that enhances the expression of an SMN2 minigene described herein or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety. In one embodiment, the minigene is a minigene described in the Examples of International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833. In another embodiment, the minigene is the minigene described in Biological Example 1, infra. The human cell can be contacted with a compound of Formula (I) or a form thereof in vitro, in a non-human animal or in a human. In a specific embodiment, the human cell is in a human. In another specific embodiment, the human cell is in a human SMA patient. In another specific embodiment, the human cell is in a human SMA patient, wherein SMA is caused by an inactivating mutation or deletion in the SMN1 gene on both chromosomes, resulting in a loss of SMN1 gene function. In another embodiment, the human cell is a human cell from a human SMA patient. In certain embodiments, the human cell is from a cell line, such as GM03813, GM00232, GM09677, and/or GM23240 (available from Coriell Institute).

In another aspect, provided herein are methods for enhancing the inclusion of exon 7 of SMN1 into RNA transcribed from the SMN1 gene, comprising contacting a human cell with a compound of Formula (I) or a form thereof. In a specific embodiment, provided herein are methods for enhancing the inclusion of exon 7 of SMN1 into RNA transcribed from the SMN1 gene, comprising contacting a human cell with a compound of Formula (I) or a form thereof. In another specific embodiment, provided herein are methods for enhancing the inclusion of exon 7 of SMN1 into RNA transcribed from the SMN1 gene, comprising contacting a human cell with a compound of Formula (I) or a form thereof that modulates the expression of an SMN1 minigene described in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety. In one embodiment, the minigene is a minigene described in the Examples of International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833. The human cell can be contacted with a compound of Formula (I) or a form thereof in vitro, in a non-human animal or in a human. In a specific embodiment, the human cell is in a human. In another specific embodiment, the human cell is in a human SMA patient.

In specific embodiments, provided herein are methods for enhancing the inclusion of exon 7 of SMN1 and SMN2 into RNA transcribed from the SMN1 and SMN2 genes, comprising contacting a human cell with a compound of Formula (I) or a form thereof. The human cell can be contacted with a compound of Formula (I) or a form thereof in vitro, in a non-human animal or in a human. In a specific embodiment, the human cell is in a human. In another specific embodiment, the human cell is in a human SMA patient.

In another aspect, provided herein is a method for modulating the inclusion of exon 7 of SMN2 into RNA transcribed from the SMN2 gene, comprising administering to a non-human animal model for SMA a compound of Formula (I) or a form thereof. In a specific embodiment, provided herein is a method for modulating the inclusion of exon 7 of SMN2 into RNA transcribed from the SMN2 gene, comprising administering to a non-human animal model for SMA a compound of Formula (I) or a form thereof that modulates the expression of an SMN2 minigene described herein or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety. In one embodiment, the minigene is a minigene described in the Examples of International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833. In another embodiment, the minigene is the minigene described in Biological Example 1, infra.

In a specific embodiment, provided herein is a method for enhancing the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, comprising administering to a non-human animal model for SMA a compound of Formula (I) or a form thereof. In another specific embodiment, provided herein is a method for enhancing the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, comprising administering to a non-human animal model for SMA a compound of Formula (I) or a form thereof that enhances the expression of an SMN2 minigene described herein or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety. In one embodiment, the minigene is a minigene described in the Examples of International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833. In another embodiment, the minigene is the minigene described in Biological Example 1, infra.

In another aspect, provided herein is a method for enhancing the inclusion of exon 7 of SMN1 into RNA transcribed from the SMN1 gene, comprising administering to a non-human animal model for SMA a compound of Formula (I) or a form thereof. In a specific embodiment, provided herein is a method for enhancing the inclusion of exon 7 of SMN1 into RNA transcribed from the SMN1 gene, comprising administering to a non-human animal model for SMA a compound of Formula (I) or a form thereof that modulates the expression of an SMN1 minigene described herein or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety. In one embodiment, the minigene is a minigene described in the Examples of International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833. In specific embodiments, provided herein is a method for enhancing the inclusion of exon 7 of SMN1 and SMN2 into RNA transcribed from the SMN1 and SMN2 genes, comprising administering to a non-human animal model for SMA a compound of Formula (I) or a form thereof.

In another aspect, provided herein is a method for increasing the amount of Smn protein, comprising contacting a human cell with a compound of Formula (I) or a form thereof. In a specific embodiment, provided herein is a method for increasing the amount of Smn protein, comprising contacting a human cell with a compound of Formula (I) that enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. In another specific embodiment, provided herein is a method for increasing the amount of Smn protein, comprising contacting a human cell with a compound of Formula (I) that enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene. The human cell can be contacted with a compound of Formula (I) or a form thereof in vitro, in a non-human animal or in a human. In a specific embodiment, the human cell is in a human. In another specific embodiment, the human cell is in a human SMA patient. In another specific embodiment, the human cell is in a human SMA patient, wherein SMA is caused by an inactivating mutation or deletion in the SMN1 gene on both chromosomes, resulting in a loss of SMN1 gene function. In another embodiment, the human cell is a human cell from a human SMA patient. In certain embodiments, the human cell is from a cell line, such as GM03813, GM00232, GM09677, and/or GM23240 (available from Coriell Institute).

In another aspect, provided herein is a method for increasing the amount of Smn protein, comprising administering to a non-human animal model for SMA a compound of Formula (I) or a form thereof In a specific embodiment, provided herein is a method for increasing the amount of Smn protein, comprising administering to a non-human animal model for SMA a compound of Formula (I) that enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene in, e.g., a cell-based or cell-free assay, such as described in the Biological Examples, infra. In another specific embodiment, provided herein is a method for increasing the amount of Smn protein, comprising administering to a non-human animal model for SMA a compound of Formula (I) that enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene in, e.g., a cell-based or cell-free assay.

In one embodiment, the compound of Formula (I) enhances the expression of a minigene described herein or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety. In a specific embodiment, the compound of Formula (I) enhances the expression of a minigene described in the Examples of International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833. In another specific embodiment, the compound of Formula (I) enhances the expression of a minigene described in Biological Example 1, infra.

In one embodiment, provided herein is the use of a compound of Formula (I) or a form thereof for the preparation of a medicament that enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. In another embodiment, provided herein is the use of a compound of Formula (I) or a form thereof for the preparation of a medicament that enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, thereby increasing expression of Smn protein in a human subject in need thereof. In a particular embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene in an assay described herein (see, e.g., the Biological Examples, infra).

In one embodiment, provided herein is the use of a compound of Formula (I) or a form thereof for the preparation of a medicament that enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene. In another embodiment, provided herein is the use of a compound of Formula (I) or a form thereof for the preparation of a medicament that enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene, thereby increasing expression of Smn protein in a human subject in need thereof.

In another aspect, provided herein are methods for enhancing the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene in a human subject in need thereof, comprising administering to the human subject an effective amount of a compound of Formula (I) or a form thereof. In a specific embodiment, provided herein is a method for enhancing the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene in a human subject in need thereof, comprising administering to the human subject an effective amount a compound of Formula (I) or a form thereof that enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene as determined in an assay described herein (see, e.g., the Biological Examples, infra). In specific embodiments, the effective amount of the compound of Formula (I) or a form thereof is administered to the human subject in a pharmaceutical composition comprising a pharmaceutically acceptable carrier, excipient or diluent. In a particular embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene in an assay described herein (see, e.g., the Biological Examples, infra). In a specific embodiment, the human subject is a human SMA patient. In another specific embodiment, the human subject is a human SMA patient, wherein SMA is caused by an inactivating mutation or deletion in the SMN1 gene on both chromosomes, resulting in a loss of SMN1 gene function.

In another aspect, provided herein are methods for enhancing the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene in a human subject in need thereof, comprising administering to the human subject an effective amount of a compound of Formula (I) or a form thereof. In a particular embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene in an assay described in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833. In specific embodiments, the effective amount of the compound of Formula (I) or a form thereof is administered to the human subject in a pharmaceutical composition comprising a pharmaceutically acceptable carrier, excipient or diluent. In a specific embodiment, the human subject is a human SMA patient.

In another aspect, provided herein is a method for enhancing the inclusion of exon 7 of SMN1 and SMN2 into mRNA that is transcribed from the SMN1 and SMN2 genes in a human subject in need thereof, comprising administering to the human subject an effective amount a compound of Formula (I) or a form thereof In a particular embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN1 into mRNA that is transcribed from the SMN1 gene in an assay(s) described in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833 (see, e.g., the Examples in those publications), each of which is incorporated herein by reference in its entirety. In specific embodiments, the effective amount of the compound of Formula (I) or a form thereof is administered to the human subject in a pharmaceutical composition comprising a pharmaceutically acceptable carrier, excipient or diluent. In a specific embodiment, the human subject is a human SMA patient. In another specific embodiment, the human subject is a human SMA patient, wherein SMA is caused by an inactivating mutation or deletion in the SMN1 gene on both chromosomes, resulting in a loss of SMN1 gene function.

In another aspect, provided herein are methods for enhancing the expression of Smn protein in a human subject in need thereof, comprising administering to the human subject an effective amount of a compound of Formula (I) or a form thereof. In a specific embodiment, provided herein is a method for enhancing the expression of Smn protein in a human subject in need thereof, comprising administering to the human subject an effective amount a compound of Formula (I) or a form thereof that enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. In another specific embodiment, provided herein is a method for enhancing the expression of Smn protein in a human subject in need thereof, comprising administering to the human subject an effective amount a compound of Formula (I) or a form thereof that enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene. In specific embodiments, the effective amount of the compound of Formula (I) or a form thereof is administered to the human subject in a pharmaceutical composition comprising a pharmaceutically acceptable carrier, excipient or diluent. In a particular embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene in an assay described herein (see, e.g., the Biological Examples, infra) or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833 (see, e.g., the Examples in those publications), each of which is incorporated herein by reference in its entirety.

In a specific embodiment, the human subject is a human SMA patient. In another specific embodiment, the human subject is a human SMA patient, wherein SMA is caused by an inactivating mutation or deletion in the teleomeric copy of the SMN1 gene in both chromosomes, resulting in a loss of SMN1 gene function.

In another embodiment, provided herein is the use of a compound of Formula (I) or a form thereof for the preparation of a medicament that enhances expression of Smn protein in a human subject in need thereof. In a particular embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene as determined in an assay described herein (see, e.g., the Biological Examples, infra). In another embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene as determined in an assay described herein (see, e.g., the Biological Examples, infra) or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833 (see, e.g., the Examples in those publications), each of which is incorporated herein by reference in its entirety.

In another aspect, provided herein are methods for treating spinal muscular atrophy (SMA), comprising administering to a subject an effective amount of a compound of Formula (I) or a form thereof. In a specific embodiment, provided herein is a method for treating SMA in a human subject in need thereof, comprising administering to the subject an effective amount of a compound of Formula (I) or a form thereof. In another specific embodiment, provided herein is a method for treating SMA in a human subject in need thereof, comprising administering to the subject a pharmaceutical composition comprising an effective amount of a compound of Formula (I) or a form thereof, and a pharmaceutically acceptable carrier, excipient or diluent.

In another embodiment, provided herein is a method for treating SMA in a human subject in need thereof, comprising administering to the subject an effective amount of a compound of Formula (I) or a form thereof that enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene. In a specific embodiment, provided herein is a method for treating SMA in a human subject in need thereof, comprising administering to the subject a pharmaceutical composition comprising an effective amount of a compound of Formula (I) or a form thereof that enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene, and a pharmaceutically acceptable carrier, excipient or diluent. In another specific embodiment, provided herein is a method for treating SMA in a human subject in need thereof, comprising administering to the human subject a pharmaceutical composition comprising an effective amount of a compound of Formula (I) or a form thereof that enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene, and a pharmaceutically acceptable carrier, excipient or diluent. In a particular embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene in an assay described herein (see, e.g., the Biological Examples, infra). In another embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene as determined in an assay described herein (see, e.g., the Biological Examples, infra) or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833 (see, e.g., the Examples in those publications), each of which is incorporated herein by reference in its entirety.

In another embodiment, provided herein is the use of a compound of Formula (I) or a form thereof in the manufacture of a medicament for treating SMA in a human subject in need thereof. In a particular embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene as determined in an assay described herein (see, e.g., the Biological Examples, infra). In another embodiment, the compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene as determined in an assay described herein (see, e.g., the Biological Examples, infra) or in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833 (see, e.g., the Examples in those publications), each of which is incorporated herein by reference in its entirety.

In an embodiment of a use or method provided herein, compounds of Formula (I) or a form thereof are used in combination with one or more additional agents. A compound(s) of Formula (I) or a form thereof can be administered to a subject or contacted with a cell prior to, concurrently with, or subsequent to administering to the subject or contacting the cell with an additional agent(s). A compound(s) of Formula (I) or a form thereof and an additional agent(s) can be administered to a subject or contacted with a cell in single composition or different compositions. In a specific embodiments, a compound(s) of Formula (I) or a form thereof is used in combination with gene replacement of SMN1 (using, e.g., viral delivery vectors). In another specific embodiments, a compound(s) of Formula (I) or a form thereof are used in combination with cell replacement using differentiated SMN1^(+/+) and/or SMN2^(+/+) stem cells. In another specific embodiments, a compound(s) of Formula (I) or a form thereof are used in combination with cell replacement using differentiated SMN1^(+/+) stem cells. In another specific embodiments, a compound(s) of Formula (I) or a form thereof are used in combination with cell replacement using differentiated SMN2^(+/+) stem cells. In another specific embodiment, a compound(s) of Formula (I) or a form thereof are used in combination with aclarubicin. In another specific embodiment, a compound(s) of Formula (I) or a form thereof are used in combination with a transcription activator such as a histone deacetylase (“HDAC”) inhibitor (e.g., butyrates, valproic acid, and hydroxyurea), and mRNA stabilizers (e.g., mRNA decapping inhibitor RG3039 from Repligen).

In one embodiment, provided herein is the use of compounds of Formula (I) or a form thereof in combination with supportive therapy, including respiratory, nutritional or rehabilitation care.

In certain embodiments, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) has a therapeutic effect and/or beneficial effect. In a specific embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in one, two or more of the following effects: (i) reduces or ameliorates the severity of SMA; (ii) delays onset of SMA; (iii) inhibits the progression of SMA; (iv) reduces hospitalization of a subject; (v) reduces hospitalization length for a subject; (vi) increases the survival of a subject; (vii) improves the quality of life of a subject; (viii) reduces the number of symptoms associated with SMA; (ix) reduces or ameliorates the severity of a symptom(s) associated with SMA; (x) reduces the duration of a symptom associated with SMA; (xi) prevents the recurrence of a symptom associated with SMA; (xii) inhibits the development or onset of a symptom of SMA; and/or (xiii) inhibits of the progression of a symptom associated with SMA.

Symptoms of SMA include muscle weakness, poor muscle tone, weak cry, weak cough, limpness or a tendency to flop, difficulty sucking or swallowing, difficulty breathing, accumulation of secretions in the lungs or throat, clenched fists with sweaty hand, flickering/vibrating of the tongue, head often tilted to one side, even when lying down, legs that tend to be weaker than the arms, legs frequently assuming a “frog legs” position, feeding difficulties, increased susceptibility to respiratory tract infections, bowel/bladder weakness, lower-than-normal weight, inability to sit without support, failure to walk, failure to crawl, and hypotonia, areflexia, and multiple congenital contractures (arthrogryposis) associated with loss of anterior horn cells.

In a specific embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in one, two or more of the following effects: (i) a reduction in the loss of muscle strength; (ii) an increase in muscle strength; (iii) a reduction in muscle atrophy; (iv) a reduction in the loss of motor function; (v) an increase in motor neurons; (vii) a reduction in the loss of motor neurons; (viii) protection of SMN deficient motor neurons from degeneration; (ix) an increase in motor function; (x) an increase in pulmonary function; and/or (xi) a reduction in the loss of pulmonary function.

In another embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in the functional ability or helps retain the functional ability for a human infant or a human toddler to sit up. In another embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in the functional ability or helps retain the functional ability for a human infant, a human toddler, a human child or a human adult to stand up unaided. In another embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in the functional ability or helps retain the functional ability for a human infant, a human toddler, a human child or a human adult to walk unaided. In another embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in the functional ability or helps retain the functional ability for a human infant, a human toddler, a human child or a human adult to run unaided. In another embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in the functional ability or helps retain the functional ability for a human infant, a human toddler, a human child or a human adult to breathe unaided. In another embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in the functional ability or helps retain the functional ability for a human infant, a human toddler, a human child or a human adult to turn during sleep unaided. In another embodiment, treating SMA with a compound of Formula (I) or a form thereof (alone or in combination with an additional agent) results in the functional ability or helps retain the functional ability for a human infant, a human toddler, a human child or a human adult to swallow unaided.

In certain embodiments, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 8, 11 or 13 and/or SEQ ID NO. 2, 9 or 12, and SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot, to determine whether a compound of Formula (I) or a form thereof enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from an SMN1 and/or SMN2 gene. In some embodiments, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 8, 11 or 13 and/or SEQ ID NO. 2, 9 or 12, and SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification, Northern blot or Southern blot, or a pharmaceutical or assay kit as described infra, to monitor patient responses to a compound of Formula (I) or a form thereof.

In a specific embodiment, a compound of Formula (I):

-   -   or a form thereof is used in accordance with a method described         herein, wherein:     -   w₁ and w₂ are C—R₁ or C—R₂; wherein, one of w₁ and w₂ is C—R₁         and the other is C—R₂, provided that, when w₁ is C—R₁, then w₂         is C—R₂; or, when w₁ is C—R₂, then w₂ is C—R₁;     -   R₁ is C₁₋₈alkyl, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino,         C₁₋₈alkoxy-C₁₋₈alkyl-amino, (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino,         (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino, amino-C₁₋₈alkyl,         C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         amino-C₁₋₈alkyl-amino, (amino-C₁₋₈alkyl)₂-amino,         (amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino,         (C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino,         [(C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         amino-C₁₋₈alkoxy, C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         C₁₋₈alkoxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (C₁₋₈alkoxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         (C₁₋₈alkoxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy,         amino-C₂₋₈alkenyl, C₁₋₈alkyl-amino-C₂₋₈alkenyl,         (C₁₋₈alkyl)₂-amino-C₂₋₈alkenyl, amino-C₂₋₈alkynyl,         C₁₋₈alkyl-amino-C₂₋₈alkynyl, (C₁₋₈alkyl)₂-amino-C₂₋₈alkynyl,         halo-C₁₋₈alkyl-amino, (halo-C₁₋₈alkyl)₂-amino,         (halo-C₁₋₈alkyl)(C₁₋₈alkyl)amino, hydroxy-C₁₋₈alkyl,         hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl)₂-amino, (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkoxy,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkoxy,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkoxy,         hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)₂-amino,         (hydroxy-C₁₋₈alkyl-amino-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         (hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino,         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl-amino,         [(hydroxy-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         [(hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl](C₁₋₈alkyl)amino,         heterocyclyl, heterocyclyl-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkoxy,         heterocyclyl-amino, (heterocyclyl)(C₁₋₈alkyl)amino,         heterocyclyl-amino-C₁₋₈alkyl, heterocyclyl-C₁₋₈alkyl-amino,         (heterocyclyl-C₁₋₈alkyl)₂-amino,         (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         heterocyclyl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (heterocyclyl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (heterocyclyl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl,         heterocyclyl-oxy, heterocyclyl-carbonyl,         heterocyclyl-carbonyl-oxy, aryl-C₁₋₈alkyl-amino,         (aryl-C₁₋₈alkyl)₂-amino, (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         aryl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (aryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         (aryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl, heteroaryl,         heteroaryl-C₁₋₈alkyl, heteroaryl-C₁₋₈alkoxy, heteroaryl-amino,         heteroaryl-C₁₋₈alkyl-amino, (heteroaryl-C₁₋₈alkyl)₂-amino,         (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino,         heteroaryl-C₁₋₈alkyl-amino-C₁₋₈alkyl,         (heteroaryl-C₁₋₈alkyl)₂-amino-C₁₋₈alkyl or         (heteroaryl-C₁₋₈alkyl)(C₁₋₈alkyl)amino-C₁₋₈alkyl;     -   wherein, each instance of heterocyclyl and heteroaryl is         optionally substituted with one, two or three R₃ substituents         and one additional, optional R₄ substituent; and,     -   wherein, alternatively, each instance of heterocyclyl and         heteroaryl is optionally substituted with one, two, three or         four R₃ substituents;     -   R₂ is aryl, aryl-amino, aryl-amino-carbonyl, heterocyclyl,         heteroaryl or heteroaryl-amino;     -   wherein, each instance of aryl, heterocyclyl and heteroaryl is         optionally substituted with one, two or three R₆ substituents         and one additional, optional R₇ substituent;     -   R_(a) is, in each instance, independently selected from         hydrogen, halogen or C₁₋₈alkyl;     -   R_(b) is hydrogen, halogen, C₁₋₈alkyl or C₁₋₈alkoxy;     -   R₃ is, in each instance, independently selected from cyano,         halogen, hydroxy, oxo, C₁₋₈alkyl, halo-C₁₋₈alkyl,         C₁₋₈alkyl-carbonyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy,         C₁₋₈alkoxy-C₁₋₈alkyl, C₁₋₈alkoxy-carbonyl, amino,         C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, amino-C₁₋₈alkyl,         C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl,         amino-C₁₋₈alkyl-amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino,         (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino,         C₁₋₈alkyl-carbonyl-amino, C₁₋₈alkoxy-carbonyl-amino,         hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)₂-amino or         (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino;     -   R₄ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-C₁₋₈alkyl,         C₃₋₁₄cycloalkyl-amino, aryl-C₁₋₈alkyl, aryl-C₁₋₈alkoxy-carbonyl,         aryl-sulfonyloxy-C₁₋₈alkyl, heterocyclyl or         heterocyclyl-C₁₋₈alkyl; wherein, each instance of         C₃₋₁₄cycloalkyl, aryl and heterocyclyl is optionally substituted         with one, two or three R₅ substituents;     -   R₅ is, in each instance, independently selected from halogen,         hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkoxy,         halo-C₁₋₈alkoxy, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or         C₁₋₈alkyl-thio;     -   R₆ is, in each instance, independently selected from halogen,         hydroxy, cyano, nitro, C₁₋₈alkyl, C₂₋₈alkenyl, halo-C₁₋₈alkyl,         hydroxy-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, amino,         C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio; and,     -   R₇ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-oxy, aryl, heterocyclyl         or heteroaryl.

In another specific embodiment, the compound of Formula (I) used in accordance with a method described herein is a compound selected from Formula (Ia) or Formula (Ib):

or a form thereof, wherein all variables are as previously defined.

Patient Population

In some embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a subject suffering from SMA. In other embodiments, a compound of Formula (I) or a form thereof, is administered to a subject predisposed or susceptible to SMA. In a specific embodiment, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a human subject, wherein the subject has SMA caused by an inactivating mutation or deletion in the SMN1 gene on both chromosomes, resulting in a loss of SMN1 gene function. In certain embodiments, the human subject is genotyped prior to administration of a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof to determine whether the subject has an inactivating mutation or deletion in the teleomeric copy of the SMN1 gene in both chromosomes, which results in a loss of SMN1 gene function. In some embodiments, a compound of Formula (I) or a form thereof, or pharmaceutical composition thereof is administered to a subject with Type 0 SMA. In some embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a subject with Type 1 SMA. In other embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a subject with Type 2 SMA. In other embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a subject with Type 3 SMA. In some embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a subject with Type 4 SMA.

In certain embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a subject that will or might benefit from enhanced inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene. In specific embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a subject that will or may benefit from enhanced Smn protein expression.

In certain embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a human that has an age in a range of from about 0 months to about 6 months old, from about 6 to about 12 months old, from about 6 to about 18 months old, from about 18 to about 36 months old, from about 1 to about 5 years old, from about 5 to about 10 years old, from about 10 to about 15 years old, from about 15 to about 20 years old, from about 20 to about 25 years old, from about 25 to about 30 years old, from about 30 to about 35 years old, from about 35 to about 40 years old, from about 40 to about 45 years old, from about 45 to about 50 years old, from about 50 to about 55 years old, from about 55 to about 60 years old, from about 60 to about 65 years old, from about 65 to about 70 years old, from about 70 to about 75 years old, from about 75 to about 80 years old, from about 80 to about 85 years old, from about 85 to about 90 years old, from about 90 to about 95 years old or from about 95 to about 100 years old.

In some embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a human infant. In other embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a human toddler. In other embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a human child. In other embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to a human adult. In yet other embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof is administered to an elderly human.

In some embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof, is administered to a patient to prevent the onset of SMA in a patient at risk of developing SMA. In other embodiments, an effective amount of a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof, is administered to a patient to prevent the onset of SMA in a patient at risk of developing SMA. In other embodiments, a prophylactically effective amount of a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof, is administered to a patient to prevent the onset of SMA in a patient at risk of developing SMA. In other embodiments, a therapeutically effective amount of a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof, is administered to a patient to prevent the onset of SMA in a patient at risk of developing SMA. In a specific embodiment, the patient is an SMA patient.

In some embodiments, a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof, is administered to a patient to treat or ameliorate SMA in an SMA patient. In other embodiments, an effective amount of a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof, is administered to a patient to treat or ameliorate SMA in an SMA patient. In other embodiments, a prophylactically effective amount of a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof, is administered to a patient to prevent advancement of SMA in an SMA patient. In other embodiments, a therapeutically effective amount of a compound of Formula (I) or a form thereof, or a pharmaceutical composition thereof, is administered to a patient to treat or ameliorate SMA in an SMA patient. In a specific embodiment, the patient is an SMA patient.

In some embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a subject suffering from SMA. In other embodiments, a compound of Formula (I) or a form thereof, is administered to a subject predisposed or susceptible to SMA. In a specific embodiment, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a human subject, wherein the subject has SMA caused by an inactivating mutation or deletion in the SMN1 gene on both chromosomes, resulting in a loss of SMN1 gene function. In certain embodiments, the human subject is genotyped prior to administration of a compound of Formula (I) or a form thereof, or a medicament thereof to determine whether the subject has an inactivating mutation or deletion in the teleomeric copy of the SMN1 gene in both chromosomes, which results in a loss of SMN1 gene function. In some embodiments, a compound of Formula (I) or a form thereof, or medicament thereof is administered to a subject with Type 0 SMA. In some embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a subject with Type 1 SMA. In other embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a subject with Type 2 SMA. In other embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a subject with Type 3 SMA. In some embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a subject with Type 4 SMA.

In certain embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a subject that will or might benefit from enhanced inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene. In specific embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a subject that will or may benefit from enhanced Smn protein expression.

In certain embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a human that has an age in a range of from about 0 months to about 6 months old, from about 6 to about 12 months old, from about 6 to about 18 months old, from about 18 to about 36 months old, from about 1 to about 5 years old, from about 5 to about 10 years old, from about 10 to about 15 years old, from about 15 to about 20 years old, from about 20 to about 25 years old, from about 25 to about 30 years old, from about 30 to about 35 years old, from about 35 to about 40 years old, from about 40 to about 45 years old, from about 45 to about 50 years old, from about 50 to about 55 years old, from about 55 to about 60 years old, from about 60 to about 65 years old, from about 65 to about 70 years old, from about 70 to about 75 years old, from about 75 to about 80 years old, from about 80 to about 85 years old, from about 85 to about 90 years old, from about 90 to about 95 years old or from about 95 to about 100 years old.

In some embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a human infant. In other embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a human toddler. In other embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a human child. In other embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a human adult. In yet other embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to an elderly human.

In some embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof is administered to a patient to prevent the onset of SMA in a patient at risk of developing SMA. In other embodiments, an effective amount of a compound of Formula (I) or a form thereof, or a medicament thereof, is administered to a patient to prevent the onset of SMA in a patient at risk of developing SMA. In other embodiments, a prophylactically effective amount of a compound of Formula (I) or a form thereof, or a medicament thereof, is administered to a patient to prevent the onset of SMA in a patient at risk of developing SMA. In other embodiments, a therapeutically effective amount of a compound of Formula (I) or a form thereof, or a medicament thereof, is administered to a patient to prevent the onset of SMA in a patient at risk of developing SMA. In a specific embodiment, the patient is an SMA patient.

In some embodiments, a compound of Formula (I) or a form thereof, or a medicament thereof, is administered to a patient to treat or ameliorate SMA in an SMA patient. In other embodiments, an effective amount of a compound of Formula (I) or a form thereof, or a medicament thereof, is administered to a patient to treat or ameliorate SMA in an SMA patient. In other embodiments, a prophylactically effective amount of a compound of Formula (I) or a form thereof, or a medicament thereof, is administered to a patient to prevent advancement of SMA in an SMA patient. In other embodiments, a therapeutically effective amount of a compound of Formula (I) or a form thereof, or a medicament thereof, is administered to a patient to treat or ameliorate SMA in an SMA patient. In a specific embodiment, the patient is an SMA patient.

Mode of Administration

When administered to a patient, a compound of Formula (I) or a form thereof is preferably administered as a component of a composition that optionally comprises a pharmaceutically acceptable carrier, excipient or diluent. The composition can be administered orally, or by any other convenient route, for example, by infusion or bolus injection, by absorption through epithelial or mucocutaneous linings (e.g., oral mucosa, rectal, and intestinal mucosa) and may be administered together with another biologically active agent. Administration can be systemic or local. Various delivery systems are known, e.g., encapsulation in liposomes, microparticles, microcapsules, capsules, and can be used to administer the compound. In a specific embodiment, the patient is an SMA patient.

Methods of administration include but are not limited to parenteral, intradermal, intramuscular, intraperitoneal, intravenous, subcutaneous, intranasal, epidural, oral, sublingual, intranasal, intracerebral, intravaginal, transdermal, rectally, by inhalation, or topically, particularly to the ears, nose, eyes, or skin. The mode of administration is left to the discretion of the practitioner. In most instances, administration will result in the release of a compound into the bloodstream. In a specific embodiment, a compound is administered orally.

Dosage and Dosage Forms

The amount of a compound of Formula (I) or a form thereof that will be effective in the treatment of SMA depend, e.g., on the route of administration, the type of SMA, the general health of the subject, ethnicity, age, weight, and gender of the subject, diet, time, and the severity of SMA, and should be decided according to the judgment of the practitioner and each patient's or subject's circumstances.

In specific embodiments, an “effective amount,” “prophylactically effective amount” or “therapeutically effective amount” in the context of the administration of a compound of Formula (I) or a form thereof, or composition or medicament thereof refers to an amount of a compound of Formula (I) which has a therapeutic effect and/or beneficial effect. In certain specific embodiments, an “effective amount,” “prophylactically effective amount” or “therapeutically effective amount” in the context of the administration of a compound of Formula (I) or a form thereof, or composition or medicament thereof results in one, two or more of the following effects: (i) reduces or ameliorates the severity of SMA; (ii) delays onset of SMA; (iii) inhibits the progression of SMA; (iv) reduces hospitalization of a subject; (v) reduces hospitalization length for a subject; (vi) increases the survival of a subject; (vii) improves the quality of life of a subject; (viii) reduces the number of symptoms associated with SMA; (ix) reduces or ameliorates the severity of a symptom(s) associated with SMA; (x) reduces the duration of a symptom associated with SMA; (xi) prevents the recurrence of a symptom associated with SMA; (xii) inhibits the development or onset of a symptom of SMA; and/or (xiii) inhibits of the progression of a symptom associated with SMA. In certain embodiments, an effective amount of a compound of Formula (I) or a form thereof is an amount effective to enhance inclusion of exon 7 of SMN2 into SMN2 mRNA that is transcribed from the SMN2 gene and increases the levels of Smn protein produced from the SMN2 gene and thus producing a desired beneficial effect in a subject in need thereof. In some instances, the desired effect can be determined by analyzing or quantifying: (1) the inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene; or (2) the levels of Smn protein produced from the SMN2 gene. Non-limiting examples of effective amounts of a compound of Formula (I) or a form thereof are described herein.

For example, the effective amount may be the amount required to treat SMA in a human subject in need thereof, or the amount required to enhance inclusion of exon 7 of SMN2 into mRNA that is transcribed from the SMN2 gene in a human subject in need thereof, or the amount required to increase levels of Smn protein produced from the SMN2 gene in a human subject in need thereof.

In general, the effective amount will be in a range of from about 0.001 mg/kg/day to about 500 mg/kg/day for a patient or subject having a weight in a range of between about 1 kg to about 200 kg. The typical adult subject is expected to have a median weight in a range of between about 70 and about 100 kg.

Within the scope of the present description, the “effective amount” of a compound of Formula (I) or a form thereof for use in the manufacture of a medicament, the preparation of a pharmaceutical kit or in a method for treating SMA in a human subject in need thereof, is intended to include an amount in a range of from about 0.001 mg to about 35,000 mg. In a specific embodiment, the human subject is an SMA patient.

The compositions described herein are formulated for administration to the subject via any drug delivery route known in the art. Nonlimiting examples include oral, ocular, rectal, buccal, topical, nasal, ophthalmic, subcutaneous, intramuscular, intravenous (bolus and infusion), intracerebral, transdermal, and pulmonary routes of administration.

Pharmaceutical Compositions

Embodiments described herein include the use of a compound of Formula (I) or a form thereof in a pharmaceutical composition. In a specific embodiment, described herein is the use of a compound of Formula (I) or a form thereof in a pharmaceutical composition for treating SMA in a human subject in need thereof comprising administering an effective amount of a compound of Formula (I) or a form thereof in admixture with a pharmaceutically acceptable carrier, excipient or diluent. In a specific embodiment, the human subject is an SMA patient.

A compound of Formula (I) or a form thereof may optionally be in the form of a composition comprising the compound or a form thereof and an optional carrier, excipient or diluent. Other embodiments provided herein include pharmaceutical compositions comprising an effective amount of a compound of Formula (I) or a form thereof and a pharmaceutically acceptable carrier, excipient, or diluent. In a specific embodiment, the pharmaceutical compositions are suitable for veterinary and/or human administration. The pharmaceutical compositions provided herein can be in any form that allows for the composition to be administered to a subject.

In a specific embodiment and in this context, the term “pharmaceutically acceptable carrier, excipient or diluent” means a carrier, excipient or diluent approved by a regulatory agency of the Federal or a state government or listed in the U.S. Pharmacopeia or other generally recognized pharmacopeia for use in animals, and more particularly in humans. The term “carrier” refers to a diluent, adjuvant (e.g., Freund's adjuvant (complete and incomplete)), excipient, or vehicle with which a therapeutic agent is administered. Such pharmaceutical carriers can be sterile liquids, such as water and oils, including those of petroleum, animal, vegetable or synthetic origin, such as peanut oil, soybean oil, mineral oil, sesame oil and the like. Water is a specific carrier for intravenously administered pharmaceutical compositions. Saline solutions and aqueous dextrose and glycerol solutions can also be employed as liquid carriers, particularly for injectable solutions.

Typical compositions and dosage forms comprise one or more excipients. Suitable excipients are well-known to those skilled in the art of pharmacy, and non limiting examples of suitable excipients include starch, glucose, lactose, sucrose, gelatin, malt, rice, flour, chalk, silica gel, sodium stearate, glycerol monostearate, talc, sodium chloride, dried skim milk, glycerol, propylene, glycol, water, ethanol and the like. Whether a particular excipient is suitable for incorporation into a pharmaceutical composition or dosage form depends on a variety of factors well known in the art including, but not limited to, the way in which the dosage form will be administered to a patient and the specific active ingredients in the dosage form. Further provided herein are anhydrous pharmaceutical compositions and dosage forms comprising one or more compounds of Formula (I) or a form thereof as described herein. The compositions and single unit dosage forms can take the form of solutions or syrups (optionally with a flavoring agent), suspensions (optionally with a flavoring agent), emulsions, tablets (e.g., chewable tablets), pills, capsules, granules, powder (optionally for reconstitution), taste-masked or sustained-release formulations and the like.

Pharmaceutical compositions provided herein that are suitable for oral administration can be presented as discrete dosage forms, such as, but are not limited to, tablets, caplets, capsules, granules, powder, and liquids. Such dosage forms contain predetermined amounts of active ingredients, and may be prepared by methods of pharmacy well known to those skilled in the art.

Examples of excipients that can be used in oral dosage forms provided herein include, but are not limited to, binders, fillers, disintegrants, and lubricants.

Biomarkers

In certain embodiments, the amount of mRNA that is transcribed from the SMN1 gene and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 is used as a biomarker for SMA. In certain embodiments, the amount of mRNA that is transcribed from the SMN1 gene and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 is used as a biomarker for SMA. In a specific embodiment, the patient is an SMA patient.

In other embodiments, the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 is used as a biomarker for an SMA patient being treated with a compound, such as disclosed herein. In other embodiments, the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 is used as a biomarker for an SMA patient being treated with a compound, such as disclosed herein. In a specific embodiment, the patient is an SMA patient.

In some embodiments, a change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and a corresponding change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 is a biomarker for a patient being treated with a compound, such as disclosed herein. In a specific embodiment, the patient is an SMA patient.

In a specific embodiment, an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and a corresponding decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, after the administration of a compound (e.g., a compound of Formula (I) disclosed herein), indicates that the compound may be effective to treat SMA. In another specific embodiment, a decrease in the amount of mRNA that is transcribed from the SMN2 gene and includes exon 7 of SMN2 and a corresponding increase in the amount of mRNA that is transcribed from the SMN2 gene and does not include exon 7 of SMN2, after the administration of a compound (e.g., a compound of Formula (I) disclosed herein), indicates that the compound will not be effective to treat SMA. In accordance with these embodiments, an SMN primer(s) and/or an SMN probe described below can be used in assays, such as PCR (e.g., qPCR) and RT-PCR (e.g., RT-qPCR or endpoint RT-PCR) to assess and/or quantify the amount of mRNA that is transcribed from the SMN1 gene and/or SMN2 gene that does or does not include exon 7 of SMN1 and/or SMN2.

In one embodiment, provided herein are SMN primers and/or SMN probes (e.g., a forward primer having the nucleotide sequence of SEQ ID NO. 1, 7, 8, 11 or 13; and/or a reverse primer having the nucleotide sequence of SEQ ID NO. 9 or 12; and/or an SMN probe such as a SEQ ID NO. 3 or 10) for amplifying nucleic acids encoding or encoded by human SMN1 and/or SMN2. These primers can be used as primers in, e.g., RT-PCR (such as RT-PCR, endpoint RT-PCR and/or RT-qPCR as described herein or as known to one skilled in the art), PCR (such as qPCR) or rolling circle amplification, and as probes in hybridization assays, such as a Northern blot and/or a Southern blot assay. As utilized in the Biological Examples herein, endpoint RT-PCR is a reverse transcription-polymerase chain reaction that is carried out for a certain number of amplification cycles (or until starting materials are exhausted) following by a quantification of each of the DNA products using, e.g., gel electrophoretic separation, staining with a fluorescent dye, quantification of fluorescence and the like.

SEQ ID NO. 1 hybridizes to DNA or RNA comprising nucleotides corresponding to nucleotides 22 to 40 of exon 7 of SMN1 and/or SMN2, SEQ ID NO. 2 hybridizes to DNA or RNA comprising nucleotides corresponding to nucleotides 4 to 26 of the firefly luciferase coding sequence; SEQ ID NO. 7 hybridizes to nucleic acid sequences (e.g., the sense strand of DNA) comprising nucleotides corresponding to nucleotides 32 to 54 of exon 7 of SMN1 and/or SMN2 and nucleotides 1 to 4 of exon 8 of SMN1 and/or SMN2, SEQ ID NO. 8 hybridizes to nucleic acid sequences (e.g., the sense strand of DNA) comprising nucleotides corresponding, in order, to nucleotides 87 to 111 of exon 7 of SMN1 and/or SMN2 and nucleotides 1 to 3 of exon 8 of SMN1 and/or SMN2, SEQ ID NO. 9 hybridizes to nucleic acid sequences (e.g., the antisense strand of DNA or RNA) comprising nucleotides corresponding to nucleotides 39 to 62 of exon 8 of SMN1 and/or SMN2, SEQ ID NO. 11 hybridizes to nucleic acid sequences (e.g., the sense strand of DNA) comprising nucleotides corresponding to nucleotides 43 to 63 of exon 6 of SMN1 and/or SMN2, SEQ ID NO. 12 hybridizes to nucleic acid sequences (e.g., the antisense strand of DNA or RNA) comprising nucleotides corresponding to nucleotides 51 to 73 of exon 8 of SMN1 and/or SMN2, and SEQ ID NO. 13 hybridizes to nucleic acid sequence (e.g., the sense strand of DNA) comprising nucleotides corresponding to nucleotides 22 to 46 of exon 6 of SMN1 and/or SMN2.

Accordingly, an oligonucleotide corresponding to SEQ ID NO. 9, 11, 12 and/or 13 can be used in an amplification reaction to amplify nucleic acids encoding or encoded by human SMN1 and/or SMN2 lacking exon 7 of human SMN1 and/or SMN2 and nucleic acid encoding or encoded by human SMN1 and/or SMN2 and includes exon 7 of human SMN1 and/or SMN2. In contrast, an oligonucleotide corresponding to SEQ ID NO. 8 in conjunction with a downstream reverse primer (e.g., SEQ ID NO. 9 or 12) can be used to amplify nucleic acids encoding or encoded by human SMN1 and/or SMN2 lacking exon 7 of human SMN1 and/or SMN2 and an oligonucleotide corresponding to SEQ ID NO. 1 and 7 in conjunction with a downstream reverse primer (e.g., SEQ ID NO. 9 or 12) can be used to amplify nucleic acids encoding or encoded by human SMN1 and/or human SMN2 and includes exon 7 of SMN1 and/or SMN2.

SEQ ID NO. 3 hybridizes to nucleic acid sequences (e.g., the sense strand of DNA) comprising nucleotides corresponding, in order, to nucleotides 50 to 54 of exon 7 of human SMN1 and/or SMN2 and nucleotides 1 to 21 of exon 8 of human SMN1 and/or SMN2, and SEQ ID NO. 10 hybridizes to nucleic acid sequences (e.g., the sense strand of DNA) comprising nucleotides corresponding to nucleotides 7 to 36 of exon 8 of human SMN1 and/or SMN2. SEQ ID NO. 3 is useful as a probe to detect mRNA that is transcribed from the minigene and includes exon 7 of SMN1 and/or SMN2, described herein or described in International Publication No. WO 2009/151546 or U.S. Patent Application Publication No. 2011/0086833 (each of which is incorporated herein by reference in its entirety) and to detect mRNA that is transcribed from human SMN1 and/or SMN2 and includes exon 7 of SMN1 and/or SMN2. In addition, SEQ ID NO. 10 is useful as a probe to detect mRNA that is transcribed from the minigene that does or does not include exon 7 of SMN1 and/or SMN2 and to detect mRNA that is transcribed from human SMN1 and/or SMN2, described herein or as described in International Publication No. WO2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety.

In a specific embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 11 or 13 and/or SEQ ID NO. 2, 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification and, as applicable, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to determine whether a compound (e.g., a compound of Formula (I) or a form thereof) enhances the inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from an SMN1 and/or SMN2 gene.

In another embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 11 or 13 and/or SEQ ID NO. 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification and, as applicable, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to monitor the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in a patient sample. In a specific embodiment, the patient is an SMA patient.

In another embodiment, a primer and/or probe described below in the Biological Examples (e.g., SMN primers such as SEQ ID NO. 1, 7, 11 or 13 and/or SEQ ID NO. 9 or 12, and/or SMN probes such as a SEQ ID NO. 3 or 10) is used in an assay, such as RT-PCR, RT-qPCR, endpoint RT-PCR, PCR, qPCR, rolling circle amplification and, as applicable, Northern blot or Southern blot (e.g., an assay such as described below in the Biological Examples), to monitor a patient's response to a compound (e.g., a compound of Formula (I) or a form thereof). In a specific embodiment, the patient is an SMA patient.

A sample (e.g., a blood sample, PBMC sample, or tissue sample, such as a skin or muscle tissue sample) from a patient can be obtained using techniques known to one skilled in the art and the primers and/or probes described in the Biological Examples below can be used in assays (e.g., PCR, RT-PCR, RT-qPCR, qPCR, endpoint RT-PCR, rolling circle amplification, Northern blot and Southern blot) to determine the amount of mRNA that is transcribed from the SMN1 and/or SMN2 genes (e.g., the amount of mRNA that includes exon 7 of SMN2 transcribed from the SMN2 gene). A sample derived from a patient refers to a sample that is processed and/or manipulated after being obtained from the patient using techniques known to one skilled in the art. For example, a sample from a patient can be processed to, e.g., extract RNA, using techniques known to one of skill in the art. A sample from a patient can be processed to, e.g., extract RNA and the RNA is reversed transcribed to produce cDNA. In a specific embodiment, the patient is an SMA patient.

In a specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for, e.g., an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

In another specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and SMN2 genes, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for, e.g., an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and SMN2 genes. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

The amount of mRNA that is transcribed from the human SMN1 and SMN2 genes and includes exon 7 of SMN1 and SMN2 and the amount of mRNA that is transcribed from the human SMN1 and SMN2 genes and does not include exon 7 of SMN1 and SMN2 can be differentiated from each other by, e.g., size of the RNA or DNA fragment generated from SMN1 and SMN2 mRNA that includes exon 7 of SMN1 and SMN2 and from SMN1 and SMN2 mRNA that does not include exon 7 of SMN1 and SMN2.

In another specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for, e.g., an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

In another specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with an SMN probe described below (e.g., SEQ ID NO. 3 or 10) along with applicable components, e.g., of an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR), rolling circle amplification and, as applicable, Northern blot or Southern blot; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

In another specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and SMN2 genes, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with an SMN probe described below (e.g., SEQ ID NO. 3 or 10) along with applicable components for, e.g., an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR), rolling circle amplification and, as applicable, Northern blot or Southern blot; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and SMN2 genes. In a specific embodiment, the patient is an SMA patient.

The amount of mRNA that is transcribed from the human SMN1 and SMN2 genes and includes exon 7 of SMN1 and SMN2 and the amount of mRNA that is transcribed from the human SMN1 and SMN2 genes and does not include exon 7 of SMN1 and SMN2 can be differentiated from each other by, e.g., size of the RNA or DNA fragment generated from SMN1 and SMN2 mRNA that includes exon 7 of SMN1 and SMN2 and from SMN1 and SMN2 mRNA that does not include exon 7 of SMN1 and SMN2. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

In another specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with an SMN probe described below (e.g., SEQ ID NO. 10) along with applicable components for, e.g., an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR), rolling circle amplification, or Northern blot or Southern blot; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

In a specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe described herein (e.g., SEQ ID NO. 3 or 10) along with applicable components for e.g., an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

In a specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and SMN2 genes, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe described herein (e.g., SEQ ID NO. 3 or 10) along with applicable components for e.g., an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, as applicable; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and SMN2 genes. In a specific embodiment, the patient is an SMA patient.

The amount of mRNA that is transcribed from the human SMN1 and SMN2 genes and includes exon 7 of SMN1 and SMN2 and the amount of mRNA that is transcribed from the human SMN1 and SMN2 genes and does not include exon 7 of SMN1 and SMN2 can be differentiated from each other by, e.g., size of the RNA or DNA fragment generated from SMN1 and SMN2 mRNA that includes exon 7 of SMN1 and SMN2 and from SMN1 and SMN2 mRNA that does not include exon 7 of SMN1 and SMN2. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

In a specific embodiment, provided herein is a method for detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, comprising: (a) contacting a patient sample (e.g., blood sample or tissue sample) or a sample derived from a patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 8) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe described herein (e.g., SEQ ID NO. 10) along with applicable components for e.g., an RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2. In certain embodiments, the sample is from or derived from a patient administered a compound, such as a compound of Formula (I) or a form thereof as described herein. In a specific embodiment, the patient is an SMA patient.

In a specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from an SMA patient administered a compound (e.g., a compound described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 3 or 10) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from an SMA patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 3 or 10) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from an SMA patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from an SMA patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from an SMA patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR) or PCR (e.g., qPCR), wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for assessing an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound, indicate that the SMN1 and/or patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is assessed 1 hour, 2 hours, 4 hours, 8 hours, 12 hours, 16 hours, 20 hours, 1 day, 2 days, 3 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for monitoring an SMA patient's responsiveness to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for monitoring an SMA patient's responsiveness to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for monitoring an SMA patient's responsiveness to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 3 or 10) along with applicable components for e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for monitoring an SMA patient's responsiveness to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 1, 7, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 3 or 10) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2, wherein (1) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for monitoring an SMA patient's responsiveness to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for monitoring an SMA patient's responsiveness to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for monitoring an SMA patient's responsiveness to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for monitoring a SMA patient's responsiveness to a compound, comprising: (a) administering a compound to a SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 8, 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to the administration of the compound or a certain number of doses of the compound, or a certain earlier date indicates that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for monitoring an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for monitoring an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR), or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for monitoring an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for monitoring an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with an SMN probe (e.g., SEQ ID NO. 10) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In a specific embodiment, provided herein is a method for monitoring an SMA patient's response to a compound, comprising: (a) contacting an SMA patient sample (e.g., blood sample or tissue sample) or a sample derived from an SMA patient (e.g., a blood sample or tissue sample that has been processed to extract RNA) with a forward SMN primer described below (e.g., SEQ ID NO. 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (SEQ ID NO. 10) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification, wherein the sample is from or derived from a patient administered a compound (e.g., a compound of Formula (I) or a form thereof as described herein); and (b) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In another specific embodiment, provided herein is a method for monitoring an SMA patient's response to a compound, comprising: (a) administering a compound to an SMA patient; (b) contacting a sample (e.g., blood sample or tissue sample) obtained or derived from the patient with a forward SMN primer described below (e.g., SEQ ID NO. 11 or 13) and/or a reverse SMN primer described herein (e.g., SEQ ID NO. 9 or 12) and/or an SMN probe (SEQ ID NO. 10) along with applicable components for, e.g., RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification; and (c) detecting the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, wherein (1) (i) an increase in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) a decrease in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., from the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is responsive to the compound and that the compound may be or is beneficial and/or of therapeutic value to the patient; and (2) (i) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, and (ii) no change or no substantial change in the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in the patient sample relative to the amount of mRNA that is transcribed from the SMN2 gene and does not include exon 7 of SMN1 and/or SMN2 in an analogous sample (e.g., the same type of tissue sample) from the patient prior to administration of the compound or a certain number of doses of the compound, or a certain earlier date, indicate that the patient is not responsive to the compound and that the compound is not beneficial and/or of therapeutic value to the patient. In certain embodiments, the patient's response is monitored 1 day, 2 days, 3 days, 4 days, 5 days, 7 days, 14 days, 28 days, 1 month, 2 months, 3 months, 6 months, 9 months, 12 months or more after administration of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the patient has received 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 or more doses of a compound, such as a compound of Formula (I) or a form thereof as described herein. In some embodiments, the patient's response is monitored after the administration of 1-5, 5-10, 10-15, 15-20, 20-30, 30-40, 40-50, or 50-100 doses of a compound, such as a compound of Formula (I) or a form thereof as described herein.

In specific embodiments, the SMA in the patient is caused by an inactivating mutation or deletion in the SMN1 gene on both chromosomes, resulting in a loss of SMN1 gene function.

Kits

In one aspect, provided herein are pharmaceutical or assay kits comprising an SMN primer or probe described herein, in one or more containers, and instructions for use. In one embodiment, a pharmaceutical or assay kit comprises, in a container, one or more SMN reverse primers (e.g., SEQ ID NO. 2, 9 and/or 12) and/or one or more SMN forward primers (SEQ ID NO. 1, 7, 8, 11 and/or 13)) and instructions for use. In another embodiment, a pharmaceutical or assay kit comprises, in one container, an SMN reverse primer (e.g., SEQ ID NO. 2, 9 or 12), an SMN forward primer (SEQ ID NO. 1, 7, 8, 11 or 13)) and instructions for use.

In one embodiment, a pharmaceutical or assay kit comprises, in separate containers, one SMN reverse primer (e.g., SEQ ID NO. 2, 9 or 12) in one container, another SMN forward primer (e.g., SEQ ID NO. 1, 7, 8, 11 or 13)) in another container, and instructions for use.

In certain embodiments, applicable components needed for a PCR (e.g., qPCR), RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR) or rolling circle amplification, such as polymerase, deoxynucleoside triphosphates, etc., are included in such kits. In some embodiments, components needed for hybridization are included in such kits. A pharmaceutical or assay kit containing such primers can be used in PCR and RT-PCR to, e.g.,: (i) assess whether a therapeutic agent (e.g., a compound of Formula (I) or a form thereof) enhances inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene, (ii) monitor the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, and/or (iii) monitor a subject's response to a therapeutic agent (e.g., a compound of Formula (I) or a form thereof).

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the sequence found in SEQ ID NO. 1, in a container, and the reverse primer with the sequence found in SEQ ID NO. 2, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by a human SMN1 minigene or human SMN2 minigene, such as described those described herein or in International Publication No. WO 2009/151546 or U.S. Patent Application Publication No. 2011/0086833, each of which is incorporated herein by reference in its entirety. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 7, in a container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 9, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by endogenous human SMN1 and SMN2 genes. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In another specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 8, in a container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 9, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by the endogenous human SMN2 gene. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 7, in a container, the forward primer with the nucleotide sequence found in SEQ ID NO. 8, in another container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 9, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by endogenous human SMN1 and SMN2 genes. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 11, in a container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 12, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by endogenous human SMN1 and SMN2 genes. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 11, in a container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 9, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by endogenous human SMN1 and SMN2 genes. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 13, in a container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 12, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by endogenous human SMN1 and SMN2 genes. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 13, in a container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 9, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by endogenous human SMN1 and SMN2 genes. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 1, in a container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 9, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by endogenous human SMN1 and SMN2 genes. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In a specific embodiment, a pharmaceutical or assay kit comprises the forward primer with the nucleotide sequence found in SEQ ID NO. 1, in a container, and the reverse primer with the nucleotide sequence found in SEQ ID NO. 12, in another container. In certain embodiments, these primers are used in RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR), PCR (e.g., qPCR) or rolling circle amplification for amplifying nucleotide sequences encoded by endogenous human SMN1 and SMN2 genes. In other embodiments, these primers are used as probes in, e.g., hybridization assays, such as Southern blot or Northern blot.

In another embodiment, a pharmaceutical or assay kit comprises an SMN probe described herein (e.g., SEQ ID NO. 3 or 10), in one container. In other embodiments, the probe is used in, e.g., a hybridization assay, such as a Southern blot or Northern blot. In a specific embodiment, the probe is used in RT-qPCR or qPCR. In certain embodiments, components needed for a PCR (e.g., qPCR), RT-PCR (e.g., endpoint RT-PCR and/or RT-qPCR) or rolling circle amplification, such as polymerase, deoxynucleoside triphosphates, primers, etc., are included in such kits. In some embodiments, components needed for hybridization are included in such kits.

In one embodiment, a pharmaceutical or assay kit comprises an SMN reverse primer (e.g., SEQ ID NO. 2, 9 or 12) in one container, an SMN forward primer (e.g., SEQ ID NO. 1, 7, 8, 11 or 13) in another container, and an SMN probe (e.g., SEQ ID NO. 3 or 10) in another container, and instructions for use. In another embodiment, a pharmaceutical or assay kit comprises one or more SMN reverse primers (e.g., SEQ ID NO. 2, 9 and/or 12) in one container, one or more SMN forward primers (e.g., SEQ ID NO. 1, 7, 8, 11 and/or 13) in another container, and one or more SMN probe (e.g., SEQ ID NO. 3 and/or 10) in another container, and instructions for use.

In certain embodiments, components needed to run a PCR, RT-PCR or rolling circle amplification, such as polymerase, deoxynucleoside triphosphates, etc., are included in such kits. A pharmaceutical or assay kit containing such probes and/or primers can be used in PCR and RT-PCR to, e.g.,: (i) assess whether a therapeutic agent (e.g., a compound of Formula (I) or a form thereof) enhances inclusion of exon 7 of SMN1 and/or SMN2 into mRNA that is transcribed from the SMN1 and/or SMN2 gene, (ii) monitor the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and includes exon 7 of SMN1 and/or SMN2 and the amount of mRNA that is transcribed from the SMN1 and/or SMN2 gene and does not include exon 7 of SMN1 and/or SMN2, and/or (iii) monitor a subject's response to a therapeutic agent (e.g., a compound of Formula (I) or a form thereof).

In another aspect, provided herein is a pharmaceutical kit comprising a compound of Formula (I) or a form thereof, in a container, and instructions for use of the compound or form thereof. In a specific embodiment, provided herein is a pharmaceutical kit comprising a pharmaceutical composition comprising a compound of Formula (I) or a form thereof and a pharmaceutically acceptable carrier, excipient or diluent, and instructions for use. In another specific embodiment, provided herein is a pharmaceutical kit comprising a pharmaceutical composition comprising an effective amount of a compound of Formula (I) or a form thereof and a pharmaceutically acceptable carrier, excipient or diluent, and instructions for use. In one embodiment, the instructions for use explain one, two or more of the following: the dose, route of administration, frequency of administration and side effects of administration of a compound of Formula (I) or a form thereof to a subject.

General Synthetic Methods

As disclosed herein, general methods for preparing the compounds of Formula (I) or a form thereof as described herein are available via standard, well-known synthetic methodology. Many of the starting materials are commercially available or, when not available, can be prepared using the routes described below using techniques known to those skilled in the art. The synthetic schemes provided herein comprise multiple reaction steps, each of which is intended to stand on its own and can be carried out with or without any preceding or succeeding step(s). In other words, each of the individual reactions steps of the synthetic schemes provided herein in isolation is contemplated.

Scheme A

Compounds of Formula (I), wherein R₂ is an aryl or heteroaryl monocyclic or bicyclic ring system, can be prepared as described in Scheme A below.

Compound A1 (where X represents various reactive groups which may be used to prepare R₁ substituents via functional group substitution reactions using techniques known to a person of ordinary skill in the art) can be regioselectively formylated by treatment with a Lewis acid (such as MgCl₂ and the like) and paraformaldehyde in a suitable solvent (such as acetonitrile or THF and the like) to afford Compound A2. Compound A2 is reacted with Compound A3, where R is a C₁₋₄alkyl group (such as methyl, ethyl, t-butyl and the like), and in the presence of condensation reagents (such as piperidine/acetic acid and the like) will undergo Knoevenagel condensation followed by lactone formation to afford Compound A4.

Compound A3 can be prepared by combining a mixture of acetic acid ester (such as t-butyl acetate and the like) and a base (such as LiHMDS and the like) in a suitable solvent (such as THF and the like) with Compound A5, wherein R₂ represents an aryl, heterocycle or heteroaryl and L represents a leaving group.

Scheme B

Compounds of Formula (I), wherein R₂ is a bicyclic heteroaryl ring system, can be prepared as described in Scheme B below.

Compound B2, an optionally substituted monocyclic heteroaryl ring system containing an amidine-like moiety (such as but not limited to 2-aminopyridine, 2-aminopyrimidine, 2-aminopyrazine, 3-aminopyridazine, 2-aminothiazole, 4-aminothiazole, 4-aminopyrimidine and the like) is reacted with Compound B1 (where R represents a C₁-4alkyl group such as methyl, ethyl and the like) in a suitable solvent (such as EtOH and the like) to give Compound B3. Compound B3, is reacted with Compound A2, and in the presence of condensation reagents (such as piperidine/acetic acid and the like), will undergo Knoevenagel condensation followed by lactone formation to afford Compound B4.

Scheme C

Compounds of Formula (I), wherein R₂ is a bicyclic heteroaryl ring system, can be prepared as described in Scheme C below.

Compound C1 (where R represents a C₁₋₄alkyl group such as methyl, ethyl and the like) is reacted with Compound C2, an optionally substituted aniline (where Y can be OH, NH₂, or SH; and, where the aniline ring may have one or more carbon atom ring members replaced with one or more nitrogen atoms, thus making Compound C2 an optionally substituted ring system such as a pyridine, pyrimidine, pyrazine and the like), and in a suitable solvent (such as EtOH or acetonitrile and the like) affords Compound C3. Compound C3 is reacted with Compound A2, and in the presence of condensation reagents (such as piperidine/acetic acid and the like), will undergo Knoevenagel condensation followed by lactone formation to afford Compound C4.

Scheme D

Compounds of Formula (I), wherein R₂ is a monocyclic heteroaryl ring system, can be prepared as described in Scheme D below.

Compound D1 (where R represents a C₁₋₄alkyl group such as methyl, ethyl and the like) is reacted with hydrogen sulfide in the presence of an organic base (such as triethylamine and the like) and a suitable solvent (such as pyridine and the like) to give Compound D2. Compound D2 is reacted with Compound D3, an a-bromoketone (where W represents a C₁₋₄alkyl or halo-C₁₋₄alkyl group such as methyl, ethyl, trifluoromethyl and the like), and in an appropriate solvent (such as DMF and the like), undergoes a tandem alkylation dehydrative condensation to give Compound D4. Compound D4 is reacted with Compound A2, and in the presence of condensation reagents (such as piperidine/acetic acid and the like), will undergo Knoevenagel condensation followed by lactone formation to afford Compound D5.

Scheme E

Compounds of Formula (I), wherein R₂ is a monocyclic or bicyclic aryl or heteroaryl ring system, can be prepared as described in Scheme E below.

Compound A2 is reacted with acetic anhydride, and in the presence of an organic base (such as triethylamine and the like), undergoes Aldol condensation/lactone formation to afford Compound E1. Compound E1 is brominated with an appropriate brominating reagent (such as Br₂ or NBS) to afford Compound E2. Compound E2 is reacted with a boronic acid (where Z represents B(OH)₂ and the like) or a trialkyl stannane (where Z represents SnBu₃ and the like), and in the presence of a palladium catalyst (such as tetrakis (triphenylphosphine)palladium(0), bis(triphenylphosphine) palladium(II) dichloride, palladium acetate and the like) and an appropriate phospine ligand will undergo Suzuki or Stille cross coupling to give Compound A4.

Scheme F

Compounds of Formula (I), wherein R₂ is a monocyclic or bicyclic aryl-amino or heteroaryl-amino, can be prepared as described in Scheme F below.

Compound E2 is reacted with Compound F1, where Ar represents an optionally substituted monocyclic or bicyclic aryl or heteroaryl ring system such as an optionally substituted aniline or amino-heteroaryl, in the presence of a palladium catalyst (such as tris(dibenzylideneacetone)dipalladium(0) and the like), phosphine ligand (such as xantphos and the like), and an inorganic base (such as cesium carbonate and the like) in an appropriate solvent (such as 1,4-dioxane or toluene and the like) to afford Compound F2.

Scheme G

Compounds of Formula (I), wherein R₂ is a bicyclic heteroaryl ring system, can be prepared as described in Scheme G below.

Compound A2 is reacted with ethyl acetoacetate, and in the presence of condensation reagents (such as piperidine/acetic acid and the like), will undergo Knoevenagel condensation followed by lactone formation to afford Compound G1. The α-methyl group of Compound G1 can be selectively brominated with an appropriate brominating reagent (such as Br₂ or NBS and the like) to afford Compound G2. Compound G2 is reacted with Compound B2, an optionally substituted monocyclic heteroaryl ring system containing an amidine-like moiety (such as but not limited to 2-aminopyridine, 2-aminopyrimidine, 2-aminopyrazine, 3-aminopyridazine, 2-aminothiazole, 4-aminothiazole, 4-aminopyrimidine and the like) in a suitable solvent (such as acetonitrile and the like) to give Compound B4.

Scheme H

Compounds of Formula (I), wherein R₂ is a bicyclic heteroaryl ring system, can be prepared as described in Scheme H below.

Compound G2 is reacted with Compound H1, an optionally substituted monocyclic heteroaryl ring system containing a ketimine-like moiety (such as but not limited to 2-methylpyridine, 2-methylpyrimidine, 2-methylpyrazine, 3-methylpyridazine and the like), and in a suitable solvent (such as acetonitrile and the like), undergoes a tandem alkylation dehydrative cyclization reaction to give Compound H2.

Scheme I

Compounds of Formula (I), wherein R₂ is a bicyclic heteroaryl ring system, can be prepared as described in Scheme I below.

Compound E2 is reacted with trimethylsilylacetylene and an organic base (such as triethylamine and the like) in the presence of copper(I) iodide and a palladium catalyst (such as tetrakis(triphenylphosphine)palladium(0), bis(triphenylphosphine)palladium(II) dichloride, palladium acetate and the like) and, in the presence of an appropriate phospine ligand undergoes a Sonogashira coupling. The resulting trimethylsilylacetylene product when treated with an inorganic base (such as potassium carbonate and the like) in an appropriate solvent (such as methanol and the like) yields Compound I1. Compound I1 can undergo an additional Sonogashira coupling with Compound 12, an iodo-hydroxy-substituted monocyclic heteroaryl ring system (where the heteroaryl ring may have one or more additional nitrogen atom ring members, thus making Compound 12 an iodo-hydroxy-substituted ring system such as a pyridine, pyrimidine, pyrazine and the like, and where the iodo and hydroxy substituents are in an ortho orientation with respect to one another, such as 2-iodopyridin-3-ol, 4-iodopyridin-3-ol and the like) to give Compound 13.

Scheme J

Compounds of Formula (I), wherein R₂ is a monocyclic or bicyclic heteroaryl ring system, can be prepared as described in Scheme J below.

Compound I1 is reacted with Compound J1, a chloro-iodo-substituted monocyclic heteroaryl ring system (where the heteroaryl ring may have one or more additional nitrogen atom ring members, thus making Compound J1 a chloro-iodo-substituted ring system such as a pyridine, pyrimidine, pyrazine and the like, and where the chloro- and iodo-substituents are in an ortho orientation with respect to one another, such as 2-chloro-3-iodopyridine or 4-chloro-3-iodopyridine and the like), and an organic base (such as triethylamine and the like) in the presence of copper(I) iodide and a palladium catalyst (such as tetrakis(triphenylphosphine) palladium(0), bis(triphenylphosphine)palladium (II) dichloride, palladium acetate and the like) and, in the presence of an appropriate phospine ligand undergoes a Sonogashira coupling to afford Compound J2. Compound J2 treated with sodium hydrosulfide in a suitable solvent (such as EtOH and the like) affords Compound J3.

Scheme K

Compounds of Formula (I), wherein R₂ is an optionally substituted 1,2,4-oxadiazole ring system, can be prepared as described in Scheme K below.

Compound A2 is reacted with ethyl cyanoacetate, and in the presence of condensation reagents (such as piperidine/acetic acid and the like) will undergo Knoevenagel condensation followed by lactone formation to afford Compound K1. Compound K1 is reacted with hydroxylamine in a suitable solvent (such as CH₂Cl₂) to give Compound K2. Compound K2 is reacted with Compound K3 (where W represents a C₁₋₄alkyl, aryl or heteroaryl group), and in the presence of an organic base (such as triethylamine and the like), affords an 0-acyl-hydroxyamidine intermediate, that undergoes dehydrative cyclization at elevated temperatures (>100° C.) to yield Compound K4.

Scheme L

Compounds of Formula (I), wherein R₂ is a monocyclic heteroaryl ring system, can be prepared as described in Scheme L below.

Compound G1 is reacted with dimethylformamide dimethyl acetal and an organic base (such as pyrrolidine and the like) to give an enaminone intermediate, which is then reacted with hydrazine in the presence of an organic acid (such as acetic acid and the like) to afford Compound L1. Compound L1 is reacted with Compound L2 (where W represents a C₁₋₄alkyl, aryl, or heteroaryl group and L represents a leaving group (such as I or Br and the like), in a suitable solvent (such as DMF and the like), in the presence of an inorganic base (such as Cs₂CO₃ and the like), and an optional catalyst (such as CuI and the like) to afford Compound L3.

Scheme M

Compounds of Formula (I), wherein R₂ is a monocyclic heteroaryl ring system, can be prepared as described in Scheme M below.

Compound E1 can be regioselectively iodinated with an appropriate iodinating agent (such as iodine or bis(trifluoroacetoxy)iodo]benzene and the like) in an appropriate solvent (such as CHCl₃ and the like). Compound M1, when treated with hexabutylditin in the presence of a palladium catalyst (such as tetrakis(triphenylphosphine)palladium(0), bis(triphenylphosphine) palladium(II) dichloride, palladium acetate and the like) in an appropriate solvent (such as 1,4-dioxane or toluene), affords Compound M2. Compound M2 is reacted with 5-iodoimidazole, in the presence of a catalyst (such as tetrakis(triphenylphosphine)palladium(0), bis(triphenylphosphine)palladium(II) dichloride, palladium acetate and the like) and a cocatalyst (such as CuI and the like), in an appropriate solvent (such as 1,4-dioxane or toluene and the like) to afford Compound M3. Compound M3 is reacted with Compound L2 (where W represents a C₁₋₄alkyl, aryl, or heteroaryl group and L represents a leaving group (such as I or Br and the like), in a suitable solvent (such as DMF and the like), in the presence of an inorganic base (such as Cs₂CO₃ and the like), and an optional catalyst (such as CuI and the like) to afford Compound M4.

Scheme N

Compounds of Formula (I), wherein R₂ is a monocyclic or bicyclic aryl or heteroaryl ring system and R₃ is hydrogen or alkyl, can be prepared as described in Scheme N below.

Compound N1 is treated under the conditions for ester hydrolysis (such as aqueous NaOH), to afford Compound N2. Compound N2 is reacted with Compound N3 (where R represents a hydrogen or C₁₋₄alkyl group), and in the presence of a coupling reagent (such as N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride and the like) and an organic base (such as triethylamine and the like), undergoes ester formation followed by Knoevenagel condensation to give Compound N4.

SPECIFIC SYNTHETIC EXAMPLES

To describe in more detail and assist in understanding, the following non-limiting examples are offered to more fully illustrate the scope of compounds described herein and are not to be construed as specifically limiting the scope thereof. Such variations of the compounds described herein that may be now known or later developed, which would be within the purview of one skilled in the art to ascertain, are considered to fall within the scope of the compounds as described herein and hereinafter claimed. These examples illustrate the preparation of certain compounds. Those of skill in the art will understand that the techniques described in these examples represent techniques, as described by those of ordinary skill in the art, that function well in synthetic practice, and as such constitute preferred modes for the practice thereof. However, it should be appreciated that those of skill in the art should, in light of the present disclosure, appreciate that many changes can be made in the specific methods that are disclosed and still obtain a like or similar result without departing from the spirit and scope of the present description.

Other than in the following examples of the embodied compounds, unless indicated to the contrary, all numbers expressing quantities of ingredients, reaction conditions, experimental data, and so forth used in the specification and claims are to be understood as being modified by the term “about”. Accordingly, all such numbers represent approximations that may vary depending upon the desired properties sought to be obtained by a reaction or as a result of variable experimental conditions. Therefore, within an expected range of experimental reproducibility, the term “about” in the context of the resulting data, refers to a range for data provided that may vary according to a standard deviation from the mean. As well, for experimental results provided, the resulting data may be rounded up or down to present data consistently, without loss of significant figures. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should be construed in light of the number of significant digits and rounding techniques used by those of skill in the art.

While the numerical ranges and parameters setting forth the broad scope of the present description are approximations, the numerical values set forth in the examples set forth below are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

COMPOUND EXAMPLES

As used above, and throughout the present description, the following abbreviations, unless otherwise indicated, shall be understood to have the following meanings:

Abbreviation Meaning Δ with heating AcOH or HOAc acetic acid Ac₂O acetic anhydride Ar argon ACN acetonitrile BINAP 2,2′-bis(diphenylphosphino)-1,1′-binaphthalene B(OiPr)₃ triisopropyl borate Boc tert-butoxy-carbonyl Boc₂O di-tert-butyl dicarbonate BuOH n-butanol BrettPhos 2-(dicyclohexylphosphino)3,6-dimethoxy- 2′,4′,6′-triisopropyl-1,1′-biphenyl ° C. degrees Centigrade CDI 1,1-carbonyldiimidazole or N,N′- carbonyldiimidazole (CHO)_(n), (HCHO)_(n) or paraformaldehyde HCHO Cs₂CO₃ cesium carbonate d/h/hr/hrs/min/s day(d)/hour(h, hr or hrs)/minute(min)/second(s) DavePhos 2-dicyclohexylphosphino-2′-(N,N- dimethylamino)biphenyl DCE 1,2-dichloroethane DCM dichloromethane (CH₂Cl₂) DIAD diisopropyl azodicarboxylate DIEA or DIPEA N,N-diisopropylethylamine DMA dimethyl acetal DMAc dimethylacetamide DMAP 4-(dimethylamino)pyridine DME 1,2-dimethoxyethane DMF dimethylformamide DMSO dimethylsulfoxide EDC or EDCI N-(3-dimethylaminopropyl)-N′- ethylcarbodiimide hydrochloride EtOAc ethyl acetate EtOH ethanol Et₂O diethyl ether HCOH formaldehyde iPrI iodopropane JohnPhos (2-biphenyl)-di-t-butylphosphine KOAc potassium acetate LAH lithium aluminum hydride LC/MS, LCMS or liquid chromatographic mass spectroscopy LC-MS LDA lithium diisopropylamine LiHMDS or LHMDS lithium bis(trimethylsilyl)amide MeOH methanol MeI iodomethane Me—THF 2-methyltetrahydrofuran Me₂Zn dimethylzinc MnO₂ manganese dioxide MS mass spectroscopy NaH sodium hydride NaHS sodium hydrosulfide NaHMDS sodium bis(trimethylsilyl)amide or sodium hexamethyldisilazide NaI sodium iodide NaOAc sodium acetate NaOMe sodium methoxide NBS N-bromosuccinimide NMP N-methylpyrrolidone NMR nuclear magnetic resonance o/n overnight Pd palladium Pd/C palladium on carbon Pd(dba)₂ bis(dibenzylideneacetone)palladium(0) Pd₂(dba)₃ or Pd₂dba₃ tris(dibenzylideneacetone)dipalladium(0) PdCl₂(PhCN)₂ trans-bis(benzonitrile)dichloropalladium(II) PdCl₂(dppf), PdCl₂dppf [1,1′-bis(diphenylphosphino)- or Pd(dppf)Cl₂ ferrocene]dichloropalladium(II) Pd(OAc)₂ palladium(II) acetate Pd(PPh₃)₄ or Pd(pph₃)₄ tetrakis(triphenylphosphine)palladium(0) Pd(PPh₃)₂Cl₂, bis(triphenylphosphine)palladium(II) dichloride PdCl₂(PPh₃)₂ or PdCl₂(Ph₃P)₂ PHBu₃BF₄ or tri-tert-butylphosphonium tetrafluoroborate tBu₃PHBF₄ PhI iodobenzene PhI(OTFA)₂ [bis(trifluoroacetoxy)iodo]benzene PhMe toluene POCl₃ phosphoryl chloride PPh₃ triphenylphosphine PPA polyphosphoric acid PPTs pyridinium p-toluenesulfonate psi pounds per square inch pressure PyBOP (benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate rt room temperature RuPhos 2-dicyclohexylphosphino-2′,6′- diisopropoxybiphenyl S-Phos, SPhos or Sphos 2-dicyclohexylphosphino-2′,6′- dimethoxybiphenyl T₃P propylphosphonic anhydride TEA, Et₃N or NEt₃ triethylamine Tf₂O triflic anhydride TFA trifluoroacetic acid THF tetrahydrofuran TLC thin layer chromatography TMS trimethylsilane TMSCl trimethylchlorosilane or trimethylsilyl chloride TMSOK potassium trimethylsilanolate t-Bu tert-butyl t-BuOAc tert-butyl acetate t-BuXPhos Palladacycle chloro[2-(di-tert-butylphosphino)-2′,4′,6′- triisopropyl-1,1′-biphenyl][2- (2-aminoethyl)phenyl)]palladium(II) TsOH, p-TsOH or tosylic acid or p-toluenesulfonic acid pTSA xantphos 4,5-bis(diphenylphosphino)-9,9- dimethylxanthene

Example 1 Preparation of Cpd 4 Part 1: Preparation of ethyl 2-(benzo[d]thiazol-2-yl)acetate

A mixture of 2-aminobenzenethiol (5.34 mL, 50 mmol) and 3-ethoxy-3-iminopropanoate hydrochloride (9.75 g, 50 mmol) in EtOH (50 mL) was heated at 70° C. for 16 h. The mixture was partitioned in EtOAc (200 mL) and water (200 mL). The organic layer was washed with brine, dried over MgSO₄, filtered and concentrated. The residue was purified by silica gel column chromatography (10% EtOAc in hexanes) to give the title compound (6.0 g, 54%) as a yellow oil. MS m/z 222.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.05 (1H, d, J=8.1Hz), 7.91 (1H, d, J=8.0 Hz), 7.51 (1H, t, J=8 Hz), 7.43 (1H, t, J=8 Hz), 4.28 (2H, q, J=7.2 Hz), 4.22 (2H, s), 1.33 (3H, t, J=7.1Hz).

Part 2: Preparation of tert-butyl 4-(4-formyl-3-hydroxyphenyl)piperazine-1-carboxylate

A mixture of 4-fluoro-2-hydroxybenzaldehyde (10 g, 71.4 mmol), 1-boc-piperazine (15.3 g, 82.2 mmol), and DMSO (100 mL) was heated at 100° C. for 27 h. The reaction mixture was diluted in an aqueous K₂CO₃ solution and extracted with EtOAc. The organic layer was washed with H₂O and brine, dried over MgSO₄, filtered, and concentrated under vacuum. The residue was triturated with hexane/ether (1:1), yielding the title compound (18.8 g, 86%) as a yellow solid. MS m/z 307.2 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 11.50 (1H, s), 9.60 (1H, s), 7.36 (1H, d, J=9 Hz), 6.27 (1H, d, J=2 Hz), 6.45 (1H, dd, J=9 Hz, 2 Hz), 3.58 (4H, m), 3.42 (4H, m), 1.49 (9H, s).

Part 3: Preparation of Cpd 4

Step A: tert-Butyl 4-(4-formyl-3-hydroxyphenyl)piperazine-1-carboxylate (49 mg, 0.16 mmol) and ethyl 2-(benzo[d]thiazol-2-yl)acetate (35 mg, 0.16 mmol) were combined with piperidine (10 μL, 0.1 mmol) and acetic acid (6 μL, 0.1 mmol) in EtOH (1 mL). The mixture was heated at reflux for 1 h. After cooling the mixture to room temperature, a precipitate formed. The solid was collected by vacuum filtration, washed with 1:1 EtOH:H₂O (1 mL) and dried under vacuum to afford tert-butyl 4-(3-(benzo[d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate. Step B: tert-butyl 4-(3-(benzo[d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate was suspended in 4N HCl in 1,4-dioxane (1 mL). After stirring the mixture for 30 min at room temperature, the solvent was removed with a stream of nitrogen, to give the title compound (40 mg, 69%) as a yellow powder: m.p. 250° C. (decomp.); MS m/z 364.4 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.26 (2H, br s), 9.14 (1H, s), 8.16 (1H, d, J=7.9 Hz), 8.04 (1H, d, J=8.1 Hz), 7.93 (1H, d, J=9.0 Hz), 7.56 (1H, m), 7.47 (1H, m), 7.16 (1H, dd, J=8.9 Hz, 2.3 Hz), 7.09 (1H, d, J=2.3 Hz), 3.76-3.74 (4H, m), 3.25-3.23 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 1 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 2 Preparation of Cpd 5 Part 1: Preparation of tert-butyl 2-(4-chlorobenzo[d]thiazol-2-yl)acetate

Step A: To a solution of 1-(3-chlorophenyl)thiourea (5.09 g, 27.2 mmol) in acetic acid (100 mL) was added bromine (1.82 mL, 35.4 mmol) dropwise at 60° C. The mixture was heated at 80° C. for 2 h and the solvent was removed under reduced pressure. Diethyl ether was added to the mixture to produce a precipitate. The solid was collected and dried to give 4-chlorobenzo[d]thiazol-2-amine (5.7 g, 79%). MS m/z 185.9 [M+H]⁺.

Step B: To a mixture of 4-chlorobenzo[d]thiazol-2-amine (4.78 g, 25.8 mmol) and copper(II) chloride (4.16 g, 31 mmol) in CH₃CN (25 mL) was added t-butyl nitrite (4.61 mL, 38.8 mmol) at room temperature. The reaction mixture was heated at 60° C. for 30 min, then the solvent was removed from the mixture. The residue was suspended in water, collected by filtration and dried to give 2,4-dichlorobenzo[d]thiazole. (5.3 g, 81%). MS m/z 205.9 [M+H]⁺.

Step C: To a mixture of t-butyl acetate (4.93 mL, 36.6 mmol) and 2,4-dichlorobenzo[d]thiazole (5 g, 24.4 mmol) in toluene (20 mL) was added lithium bis(trimethylsilyl)amide (1M in THF, 66 mL, 66 mmol) at 0° C. The mixture was stirred at room temperature overnight. Excess reagent was quenched with the addition of aqueous saturated NH₄Cl. The aqueous mixture was extracted with EtOAc. The organic layer was concentrated and purified by silica gel column chromatography (0-5% EtOAC in hexanes) to give the title compound (5.9 g, 85%) as a yellow oil. MS m/z 282.1 [M−H]⁻. ¹H NMR (500 MHz, CDCl₃): δ 7.75 (1H, d, J=8.2 Hz), 7.47 (1H, d, J=7.7 Hz), 7.29 (1H, t, J=7.9 Hz), 4.15 (2H, s), 1.48 (9H, s).

Part 2: Preparation of Cpd 5

Step A: Following the procedure found in Example 1, Part 3, tert-Butyl 4-(4-formyl-3-hydroxyphenyl)piperazine-1-carboxylate (49 mg, 0.16 mmol), tert-butyl 2-(4-chlorobenzo[d]thiazol-2-yl)acetate (35 mg, 0.16 mmol), piperidine (10 μL, 0.1 mmol) and acetic acid (6 μL, 0.1 mmol) in EtOH (1 mL) gave tert-butyl 4-(3-(4-chlorobenzo[d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate. Step B: Following the procedure found in Example 1, Part 3, tert-butyl 4-(3-(4-chlorobenzo [d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate and 4N HCl in 1,4-dioxane (1 mL) gave the title compound (62 mg, 97%) as a yellow powder: m.p. 290° C. (decomp.); MS m/z 398.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.18 (2H, br s), 9.09 (1H, s), 8.14 (1H, dd, J=8.0 Hz, 1.0 Hz), 7.99 (1H, d, J=9.2 Hz), 7.65 (1H, dd, J=7.7 Hz, 1.0 Hz), 7.44 (1H, t, J=7.8 Hz), 7.17 (1H, dd, J=9.0 Hz, 2.4 Hz), 7.09 (1H, d, J=2.2 Hz), 3.77-3.74 (4H, m), 3.25-3.23 (4H, m). As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 2 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 3 Preparation of Cpd 68 Part 1: Preparation of ethyl 2-(4-chlorobenzo[d]oxazol-2-yl)acetate

Step A: A mixture of 3-chloro-2-nitrophenol (18.95 g, 100 mmol) and Pd/C (10%, 0.50 g) in MeOH (300 mL) was stirred under H₂ (1 atm). After 15 h, the mixture was filtered through Celite. The filtrate was concentrated to give a brown solid, which was washed with CH₂Cl₂ to give 2-amino-3-chlorophenol (7.39 g, 52%) as a light brown solid. MS m/z 144.1 [M+H]⁺.

Step B: To a solution of 2-amino-3-chlorophenol (2.0 g, 14 mmol) in EtOH (30 mL) was added ethyl 3-ethoxy-3-iminopropanoate hydrochloride (3.01 g, 15.4 mmol). After heating at 80° C. for 2 d, the mixture was concentrated. The residue was partitioned between EtOAc and water. The organic layer was concentrated and purified by silica gel column chromatography (CH₂Cl₂) to give ethyl 2-(4-chlorobenzo[d]oxazol-2-yl)acetate (3.17 g, 94%) as an off-white solid. MS m/z 240.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 7.75 (1H, dd, J=8.0 Hz, 0.9 Hz), 7.49 (1H, dd, J=8.0 Hz, 0.9 Hz), 7.43 (1H, t, J=8.0 Hz), 4.28 (2H, s), 4.16 (2H, q, J=7.2 Hz), 1.21 (3H, t, J=7.2 Hz).

Part 2: Preparation of Cpd 68

To a solution of ethyl 2-(4-chlorobenzo[d]oxazol-2-yl) acetate (72 mg, 0.3 mmol, prepared according to Example 1) and 2-hydroxy-4-(4-methylpiperazin-1-yl)benzaldehyde (66 mg, 0.3 mmol, prepared following the procedure in Example 1, Part 2) in CH₃CN (0.5 mL) were added piperidine (3 uL, 0.03 mmol) and AcOH (3.4 uL, 0.06 mmol). After heating at 90° C. for 2 h, the mixture was cooled to room temperature. The product was collected by vacuum filtration, washed with CH₃CN and dried to give the title compound (92 mg, 78%) as a yellow solid: m.p. 229-231° C.; MS m/z 396.2, 398.2 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.91 (1H, s), 8.79 (1H, d, J=9.1Hz), 7.76 (1H, dd, J=8.2 Hz, 0.9 Hz), 7.50 (1H, dd, J=8.0 Hz, 0.8 Hz), 7.42 (1H, t, J=8.0 Hz), 7.08 (1H, dd, J=9.0 Hz, 2.4 Hz), 6.90 (1H, d, J=2.3 Hz), 3.49 (4H, m), 2.43 (4H, m), 2.26 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 3 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 4 Preparation of Cpd 145

Step A: A mixture of ethyl 2-(benzo[d]thiazol-2-yl)acetate (0.53 g, 2.4 mmol, prepared in Example 1, Part 1), 4-fluoro-2-hydroxybenzaldehyde (0.336 g, 2.4 mmol), piperidine (80 μL, 0.8 mmol) and acetic acid (92 μL, 0.16 mmol) in CH₃CN (2 mL) was heated at 60° C. for 1 h. The mixture was filtered. The solid material was washed with CH₃CN and dried to give 3-(benzo[d]thiazol-2-yl)-7-fluoro-2H-chromen-2-one (0.57 g, 80%) as a yellow solid. MS m/z 298.1 [M+H]⁺.

Step B: A mixture of 3-(benzo[d]thiazol-2-yl)-7-fluoro-2H-chromen-2-one (89 mg, 0.3 mmol), 1-methyl-1,4-diazepane (75 μL, 0.6 mmol), N,N-diisopropylethylamine (78 μL, 0.45 mmol) in CH₃CN (1 mL) was heated at 90° C. After 15 h, the mixture was cooled to room temperature and filtered. The solid material was washed with CH₃CN to give the title compound (110 mg, 94%) as a yellow solid: m.p. 217-220° C.; MS m/z 392.2 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 9.04 (1H, s), 8.12 (1H, d, J=7.7 Hz), 7.99 (1H, d, J=8.1Hz), 7.79 (1H, d, J=9.1), 7.54-7.51 (1H, m), 7.43-7.40 (1H, m), 6.93 (1H, dd, J=9.0 Hz, 2.4 Hz), 6.76 (1H, d, J=2.2 Hz), 3.69 (2H, m), 3.61 (2H, t, J=6.2 Hz), 2.64 (2H, m), 2.46 (2H, m), 2.26 (3H, s), 1.91 (2H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 4 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 5 Preparation of Cpd 3

Step A: tert-Butyl 4-(4-formyl-3-hydroxyphenyl)piperazine-1-carboxylate (918 mg, 3 mmol, prepared in Example 1, Part 2), 2,2-dimethyl-1,3-dioxane-4,6-dione (648 mg, 4.5 mmol) and triethylamine (0.14 mL, 1 mmol) were combined in EtOH (6 mL). The mixture was heated at 60° C. for 4 h. The mixture was cooled to room temperature and filtered. The collected material was washed with EtOH and dried under vacuum to afford 7-(4-(tert-butoxycarbonyl)piperazin-1-yl)-2-oxo-2H-chromene-3-carboxylic acid (1.05 g, 94%) as a yellow powder. MS m/z 373.2 [M−H]⁻.

Step B: 7-(4-(tert-Butoxycarbonyl)piperazin-1-yl)-2-oxo-2H-chromene-3-carboxylic acid (60 mg, 0.16 mmol) was combined with aniline (22 μL, 0.24 mmol), (benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate (100 mg, 0.19 mmol) and triethylamine (45 μL, 0.32 mmol) in DMF (1 mL). The mixture was stirred at room temperature for 2 h. A solution of 4:1 MeOH:H₂O (1 mL) was added to the mixture. A precipitate formed and was collected by vacuum filtration. The solid was washed with MeOH:H₂O (4:1) and dried under vacuum to afford tert-butyl 4-(2-oxo-3-(phenylcarbamoyl)-2H-chromen-7-yl)piperazine-1-carboxylate.

Step C: A mixture of tert-butyl 4-(2-oxo-3-(phenylcarbamoyl)-2H-chromen-7-yl)piperazine-1-carboxylate in trifluoroacetic acid (1 mL) was stirred at room temperature for 20 min, then the solvent was removed with a stream of nitrogen to afford the title compound (75 mg, 99%) as a yellow powder: MS m/z 350.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 10.73 (1H, s), 8.81 (1H, s), 7.78 (1H, d, J=9.1Hz), 7.72 (2H, d, J=8.6 Hz), 7.38 (2H, m), 7.13 (1H, t, J=7.4 Hz), 7.09 (1H, dd, J=9.1Hz, 2.5 Hz), 6.93 (1H, d, J=2.3 Hz), 3.43 (4H, m), 2.81 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 5 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 6 Preparation of Cpd 160

Step A: 3,5-Difluorophenol (2.6 g, 20 mmol) was dissolved in CH₃CN (50 mL) with triethylamine (14 mL, 100 mmol). Magnesium chloride (3.8 g, 40 mmol) and paraformaldehyde (6.4 g, 200 mmol) were added sequentially. The heterogeneous mixture was stirred vigorously at 60° C. for 16 h. The mixture was diluted with H₂O (200 mL) and the pH was adjusted to <2 with aqueous HCl (1 M). The mixture was extracted with EtOAc (200 mL). The organic layer was washed with brine, dried over Na₂SO₄, then filtered and concentrated to afford 2,4-difluoro-6-hydroxybenzaldehyde (2.6 g, 82%) as a red oil. MS m/z 157.1 [M−H]⁻.

Step B: 2,4-Difluoro-6-hydroxybenzaldehyde (16 mmol) was combined with 1-Boc-piperazine (3.57 g, 19.2 mmol) and N,N-diisopropylethylamine (3.34 mL, 19.2 mmol) in DMSO (4 mL). The mixture was heated to 120° C. for 2 h. The mixture was purified by silica gel column chromatography (0-40% EtOAc in hexanes) to afford tert-butyl 4-(3-fluoro-4-formyl-5-hydroxyphenyl)piperazine-1-carboxylate (1.3 g, 25%) as an off white powder. ¹H NMR (500 MHz, DMSO-d₆): δ 11.93 (1H, s), 9.92 (1H, s), 6.08 (1H, dd, J=14.2 Hz, 2.4 Hz), 6.04 (1H, d, J=2.4 Hz), 3.59 (4H, m), 3.43 (4H, m), 1.49 (9H, s).

Step C: tert-Butyl 4-(3-fluoro-4-formyl-5-hydroxyphenyl)piperazine-1-carboxylate (65 mg, 0.2 mmol) was combined with ethyl 2-(benzo[d]thiazol-2-yl)acetate (22 mg, 0.2 mmol, prepared in Example 1, Part 1), N,N-diisopropylethylamine (35 μL, 0.2 mmol) and acetic acid (11 μL, 0.2 mmol) in EtOH (1 mL). The mixture was heated to 90° C. for 16 h. After cooling the mixture to room temperature, a precipitate was formed. The solid was collected, washed with 1:1 MeOH:H₂O (1 mL) and dried under vacuum to afford tert-butyl 4-(3-(benzo[d]thiazol-2-yl)-5-fluoro-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate.

Step D: A mixture of tert-butyl 4-(3-(benzo[d]thiazol-2-yl)-5-fluoro-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate and trifluoroacetic acid (1 mL) was stirred at room temperature for 15 min, then the solvent was removed with a stream of nitrogen. The residue was partitioned in CH₂Cl₂ (5 mL) and aqueous K₂CO₃ (1 M, 5 mL). The organic layer was collected through a hydrophobic frit and concentrated to afford the title compound (38 mg, 50%) as a yellow powder: m.p. 256-260° C.; MS m/z 382.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.89 (1H, s), 8.15 (1H, d, J=7.8 Hz), 8.05 (1H, d, J=7.3 Hz), 7.55 (1H, m), 7.44 (1H, m), 7.02 (1H, dd, J=13.9 Hz, 2.1Hz), 6.82 (1H, s), 3.45-3.41 (4H, m), 2.82-2.78 (4H, m), 2.46 (1H, s br).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 6 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 7 Preparation of Cpd 162 Part 1: Preparation of ethyl 2-(6-methylimidazo[1,2-a]pyridin-2-yl)acetate

A mixture of ethyl 4-chloroacetoacetate (5.4 mL, 40 mmol) and 5-methylpyridin-2-amine (5.18 g, 48 mmol) in EtOH (100 mL) was heated at 70° C. for 6 h. The mixture was partitioned in EtOAc (300 mL) and an aqueous saturated NaHCO₃ solution (300 mL). The organic layer was washed with brine, dried over MgSO₄, filtered and concentrated. The residue was purified by silica gel column chromatography (70% EtOAc in hexanes) to give the title compound (1.6 g, 19%) as a brown oil. ¹H NMR (500 MHz, DMSO-d₆): δ 8.31 (1H, s), 7.74 (1H, s), 7.39 (1H, d, J=9.2 Hz), 7.08 (1H, d, J=9.2 Hz), 4.10 (2H, q, J=7.1 Hz), 3.75 (2H, s), 2.27 (3H, s), 1.20 (3H, t, J=7.1 Hz).

Part 2: Preparation of Cpd 162

Step A: Following the procedure in Example 6, Step C, tert-butyl 4-(3-fluoro-4-formyl-5-hydroxyphenyl)piperazine-1-carboxylate (65 mg, 0.2 mmol), ethyl 2-(6-methylimidazo[1,2-a]pyridin-2-yl)acetate (22 mg, 0.2 mmol), N,N-diisopropylethylamine (35 μL, 0.2 mmol) and acetic acid (11 μL, 0.2 mmol) in EtOH (1 mL) gave tert-butyl 4-(5-fluoro-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate.

Step B: Following the procedure in Example 6, Step D, tert-butyl 4-(5-fluoro-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate and trifluoroacetic acid (1 mL) gave the title compound (18 mg, 24%) as a yellow powder: m.p. 265-270° C.; MS m/z 379.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.60 (1H, s), 8.42 (2H, m), 7.49 (1H, d, J=9.1Hz), 7.16 (1H, dd, J=9.3 Hz, 1.6 Hz), 6.93 (1H, dd, J=11.6 Hz, 2.2 Hz), 6.75 (1H, d, J=1.9 Hz), 3.33-3.31 (4H, m), 2.82-2.80 (4H, m), 2.28 (3H, s). As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 7 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 8 Preparation of Cpd 290

Step A: tert-Butyl 4-(3-fluoro-4-formyl-5-hydroxyphenyl)piperazine-1-carboxylate (65 mg, 0.2 mmol, prepared in Example 6, Step B) was combined with 2-(3,5-difluorophenyl)acetic acid (55 mg, 0.2 mmol), N-(3-Dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (57 mg, 0.3 mmol) and N,N-diisopropylethylamine (70 μL, 0.4 mmol) in DMF (1 mL). The mixture was heated to 60° C. for 1 h. After cooling to room temperature, the mixture was filtered. The solid was washed with MeOH:H₂O (1:1) and dried under vacuum to afford tert-butyl 4-(3-(3,5-difluorophenyl)-5-fluoro-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate.

Step B: A mixture of tert-Butyl 4-(3-(3,5-difluorophenyl)-5-fluoro-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate and trifluoroacetic acid (1 mL) was stirred at room temperature for 15 min, then the solvent was removed with a stream of nitrogen. The residue was partitioned in CH₂Cl₂ (5 mL) and aqueous K₂CO₃ (1 M, 5 mL). The organic layer was collected through a hydrophobic frit and concentrated to afford the title compound (24 mg, 33%) as a yellow powder: m.p. 193-198° C.; MS m/z 361.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.11 (1H, s), 7.44 (2H, m), 7.16 (1H, tt, J=9.3 Hz, 2.4 Hz), 6.82 (1H, dd, J=13.8 Hz, 2.2 Hz), 6.65 (1H, d, J=2.4 Hz), 3.26 (4H, m), 2.73 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 8 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 9 Preparation of Cpd 14

Step A: 3-Hydroxybenzaldehyde (6.1 g, 50 mmol) was combined with dimethylamine (37.5 mL of 2M solution in THF, 75 mmol) in 1,2-dichloroethane (200 mL). Sodium triacetoxyborohydride (15.9 g, 75 mmol) was added slowly at room temperature. Acetic acid (2.86 mL, 50 mmol) was added to the mixture. The mixture was stirred at room temperature for 16 h. To the reaction mixture was added an aqueous saturated NaHCO₃ solution (100 mL). The organic layer was removed, dried over Na₂SO₄, then filtered and concentrated to afford crude 3-((dimethylamino)methyl) phenol (−30 mmol, 60%).

Step B: The crude material (−30 mmol) from Step A was dissolved in CH₃CN (300 mL) and triethylamine (21 mL, 150 mmol). To the solution was added anhydrous magne- 50 sium chloride (5.7 g, 60 mmol) and paraformaldehyde (9.0 g, 300 mmol). The mixture was stirred vigorously at 60° C. for 16 h, then diluted with aqueous sodium potassium tartrate (0.1 M, 600 mL). The mixture was extracted three times with CH₂Cl₂ (300 mL). The combined organics were washed with brine, dried over Na₂SO₄, filtered and concentrated. The residue was purified by silica gel column chromatography (0-10% MeOH in CH₂Cl₂) to afford 4-((dimethylamino)methyl)-2-hydroxybenzaldehyde (1.7 g, 32%) as a yellow powder. MS m/z 180.1 [M+H]⁺.

Step C: A mixture of 4-((dimethylamino)methyl)-2-hydroxybenzaldehyde (0.5 mmol), ethyl 2-(4-chlorobenzo[d]thiazol-2-yl)acetate (128 mg, 0.5 mmol, prepared as in Example 2, Part 1), piperidine (40 μL, 0.4 mmol) and acetic acid (12 μL, 0.2 mmol) in EtOH (3 mL) was heated at reflux for 16 h. After cooling the mixture to room temperature, a precipitate formed. The solid was collected by vacuum filtration, washed with 1:1 EtOH:H₂O (1 mL) and dried under vacuum to afford the title compound (184 mg, 99%) as a yellow powder: m.p. 179-182° C.; MS m/z 371.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.20 (1H, s), 8.18 (1H, d, J=8.0 Hz), 8.10 (1H, d, J=8.0 Hz), 7.69 (1H, d, J=7.7 Hz), 7.48 (2H, m), 7.43 (1H, d, J=8.0 Hz), 3.57 (2H, s), 2.21 (6H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 9 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 10 Preparation of Cpd 148

Step A: Following the procedure in Example 6, Step A, 3-(hydroxymethyl)phenol (6.2 g, 50 mmol), triethylamine (35 mL, 250 mmol), anhydrous magnesium chloride (9.5 g, 100 mmol) and paraformaldehyde (15 g, 500 mmol) in CH₃CN (500 mL) afforded 2-hydroxy-4-(hydroxymethyl) benzaldehyde (2.2 g, 29%). MS m/z 151.1 [M−H]⁻.

Step B: Following the procedure in Example 9, Step C, 2-hydroxy-4-(hydroxymethyl)benzaldehyde (608 mg, 4.0 mmol), ethyl 2-(6-methylimidazo[1,2-a]pyridin-2-yl)acetate (872 mg, 4.0 mmol, prepared in Example 7, Part 1), piperidine (0.4 mL, 4.0 mmol) and acetic acid (0.24 mL, 4.0 mmol) in EtOH (4 mL) afforded 7-(hydroxymethyl)-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (980 mg, 80%). MS m/z 307.2 [M+H]⁺.

Step C: 7-(Hydroxymethyl)-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (900 mg, 2.9 mmol) was combined with N,N-diisopropylethylamine (1.0 mL, 6 mmol) in CH₂Cl₂ (15 mL). The mixture was cooled to 0° C., before adding methanesulfonyl chloride (0.28 mL, 3.6 mmol) via syringe. The mixture stirred for 1 h at 0° C., then the solvent was removed from the mixture. The residue was suspended in MeOH (5 mL) and filtered. The collected material was washed with MeOH and dried under vacuum to afford (3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2-oxo-2H-chromen-7-yl)methyl methanesulfonate (1.05 g, 92%) as a tan powder. ¹H NMR (500 MHz, DMSO-d₆): δ 8.86 (1H, s), 8.56 (1H, s), 8.46 (1H, s), 7.99 (1H, d, J=7.9 Hz), 7.56 (1H, s), 7.51 (1H, d, J=9.1Hz), 7.47 (1H, d, J=8.0 Hz), 7.20 (1H, d, 9.3 Hz), 5.41 (2H, s), 3.32 (3H, s), 2.30 (3H, s).

Step D: (3-(6-Methylimidazo[1,2-a]pyridin-2-yl)-2-oxo-2H-chromen-7-yl)methyl methanesulfonate (77 mg, 0.2 mmol) was combined with 2-(methylamino)ethanol (75 mg, 1.0 mmol) in DMF (2 mL). The mixture was stirred at room temperature for 1 h. To the mixture was added H₂O (0.25 mL) to produce a precipitate. The solid was collected by vacuum filtration, washed with MeOH:H₂O (1:1) and dried under vacuum to afford the title compound (65 mg, 90%) as an off white powder: m.p. 166-169° C.; MS m/z 364.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.83 (1H, s), 8.53 (1H, s), 8.46 (1H, s), 7.87 (1H, d, J=8.0 Hz), 7.50 (1H, d, J=9.4 Hz), 7.43 (1H, s), 7.37 (1H, d, J=7.9 Hz), 7.19 (1H, d, J=9.2 Hz), 4.47 (1H, t, J=5.4 Hz), 3.64 (2H, s), 3.54 (2H, q, J=5.5 Hz), 2.47 (2H, t, J=6.3 Hz), 2.29 (3H, s), 2.21 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 10 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 11 Preparation of Cpd 18

Step A: 4-(3-Hydroxyphenyl)piperidine (1.7 g, 10 mmol) was added to a mixture of CH₃CN (20 mL) and di-tert-butyl dicarbonate (2.4 g, 11 mmol). The mixture was stirred for 1 h at room temperature, then triethylamine (7 mL, 50 mmol), anhydrous magnesium chloride (1.9 g, 20 mmol) and paraformaldehyde (3.0 g, 100 mmol) were added. The mixture was stirred vigorously at 60° C. for 2 h, then diluted with H₂O (100 mL). Aqueous HCl (1N) was added to adjust the pH of the mixture to ˜2. The mixture was extracted with EtOAc (100 mL). The organic layer was washed with brine, dried over Na₂SO₄, filtered and concentrated. The residue was purified by silica gel column chromatography (0-5% MeOH in CH₂Cl₂) to afford tert-butyl 4-(4-formyl-3-hydroxyphenyl)piperidine-1-carboxylate (1.44 g, 47%) as a white powder. MS m/z 304.2 [M−H]⁻.

Step B: Following the procedure in Example 9, Step C, tert-butyl 4-(4-formyl-3-hydroxyphenyl)piperidine-1-carboxylate (61 mg, 0.2 mmol), ethyl 2-(4-chlorobenzo[d]thiazol-2-yl)acetate (50 mg, 0.2 mmol, prepared according to Example 2, Part 1), piperidine (10 μL, 0.1 mmol) and acetic acid (6 μL, 0.1 mmol) in EtOH (1 mL) afforded tert-butyl 4-(3-(4-chlorobenzo[d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate.

Step C: tert-Butyl 4-(3-(4-chlorobenzo[d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate was suspended in 4N HCl in 1,4-dioxane (1 mL). The mixture was stirred for 1 h, then the solvent was removed to afford the title compound (73 mg, 92%) as a yellow powder: m.p. 339-341° C.; MS m/z 397.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.21 (1H, s), 8.19 (1H, d, J=8.0), 8.14 (1H, d, J=8.1), 7.70 (1H, d, J=7.7 Hz), 7.49 (1H, t, J=7.8 Hz), 7.43 (1H, s), 7.40 (1H, d, J=8.2 Hz) 3.41 (2H, m), 3.01-3.07 (3H, m), 2.03 (2H, m), 1.92 (2H, m).

Example 12 Preparation of Cpd 28

Step A: 4-Formyl-3-hydroxybenzoic acid (830 mg, 5 mmol) was combined with 1-methylpiperazine (0.61 mL, 5.5 mmol), triethylamine (0.77 mL, 5.5 mmol) and (benzotriazol-1-yloxy)tripyrrolidinophosphonium hexafluorophosphate (2.86 g, 5.5 mmol) in CH₂Cl₂ (10 mL). The mixture was stirred at room temperature for 3 h, then concentrated and purified by silica gel column chromatography (0-5% MeOH in CH₂Cl₂) to afford 2-hydroxy-4-(4-methylpiperazine-1-carbonyl)benzaldehyde (1.24 g, 100%). MS m/z 249.1 [M+H]⁺.

Step B: Following the procedure in Example 9, Step C, 2-hydroxy-4-(4-methylpiperazine-1-carbonyl)benzaldehyde (50 mg, 0.2 mmol), ethyl 2-(4-chlorobenzo[d]thiazol-2-yl) acetate (50 mg, 0.2 mmol, prepared according to Example 2, Part 1), piperidine (20 μL, 0.2 mmol) and acetic acid (12 μL, 0.2 mmol) in EtOH (1 mL) afforded the title compound (60 mg, 68%) as a yellow powder: m.p. 230-235° C.; MS m/z 440.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.26 (1H, s), 8.24 (1H, d, J=8.0 Hz), 8.21 (1H, d, J=8.0 Hz), 7.72 (1H, d, J=7.6 Hz), 7.59 (1H, s), 7.51 (1H, t, J=7.9 Hz), 7.48 (1H, d, J=7.9 Hz), 3.65 (2H, m), 3.34 (2H, m), 2.42 (2H, m), 2.31 (2H, m), 2.22 (3H, s).

Example 13 Preparation of Cpd 35

Step A: 3-Hydroxyphenylacetic acid (2.13 g, 14 mmol) was combined with isopropylamine (3.6 mL, 42 mmol) in THF (20 mL). The solution was cooled to 0° C. before adding propylphosphonic anhydride (9.8 mL, ˜50% in DMF, 16 mmol). The solution stirred at room temperature for 16 h. The mixture was partitioned in H₂O (300 mL) and EtOAc (300 mL). The organic layer was washed with brine, dried over Na₂SO₄, filtered and concentrated. The residue was purified by silica gel column chromatography (50% EtOAc in hexanes) to afford 2-(3-hydroxyphenyl)-N-isopropylacetamide (1.9 g, 70%) as a white powder. MS m/z 194.1 [M+H]⁺.

Step B: 2-(3-Hydroxyphenyl)-N-isopropylacetamide (1.9 g, 10 mmol) was dissolved in THF (20 mL). Lithium aluminum hydride (10 mL, 1 M in THF, 10 mmol) was added to the solution. The mixture was heated to 60° C. for 2 h with stirring. The excess reagent was quenched by the slow addition of H₂O. After vigorous stirring for 1 h, the mixture was filtered through Celite. The filtrate was concentrated to afford crude 3-(2-(isopropylamino)ethyl)phenol, which was used without further purification.

Step C: 3-(2-(Isopropylamino)ethyl)phenol (716 mg, 4 mmol) was combined with di-tert-butyl dicarbonate (872 mg, 4 mmol) in CH₂Cl₂ (10 mL). The mixture was stirred at room temperature for 16 h, then concentrated and purified by silica gel column chromatography (50% EtOAc in hexanes) to afford tert-butyl 3-hydroxyphenethyl(isopropyl)carbamate (650 mg, 23%) as a white powder.

Step D: Following the procedure in Example 6, Step A, tert-butyl 3-hydroxyphenethyl(isopropyl)carbamate (650 mg, 2.3 mmol), triethylamine (1.6 mL, 11.5 mmol), anhydrous magnesium chloride (437 mg, 4.6 mmol) and paraformaldehyde (690 mg, 23 mmol) in CH₃CN (8 mL) afforded tert-butyl 4-formyl-3-hydroxyphenethyl(isopropyl) carbamate (520 mg, 73%). MS m/z 306.1 [M−H]⁻.

Step E: Following the procedure in Example 9, Step C, tert-butyl 4-formyl-3-hydroxyphenethyl(isopropyl)carbamate (50 mg, 0.16 mmol), ethyl 2-(4-chlorobenzo[d]thiazol-2-yl)acetate (50 mg, 0.2 mmol, prepared according to Example 2, Part 1), piperidine (20 μL, 0.2 mmol) and acetic acid (12 μL, 0.2 mmol) in EtOH (1 mL) afforded tert-butyl 2-(3-(4-chlorobenzo[d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl)ethyl(isopropyl)carbamate.

Step F: A mixture of 2-(3-(4-chlorobenzo[d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl)ethyl(isopropyl)carbamate (0.16 mmol) and trifluoroacetic acid (1 mL) was stirred at room temperature for 15 min, then the solvent was removed with a stream of nitrogen. The residue was partitioned in CH₂Cl₂ (5 mL) and aqueous K₂CO₃ (1 M, 5 mL). The organic layer was collected through a hydrophobic frit and concentrated to afford the title compound (42 mg, 66%) as a yellow powder: m.p. 179-182° C.; MS m/z 399.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.23 (1H, s), 8.22 (1H, d, J=7.8 Hz), 8.10 (1H, d, J=8.0 Hz), 7.73 (1H, d, J=7.7 Hz), 7.52 (1H, t, J=7.8 Hz), 7.50 (1H, s), 7.42 (1H, d, J=8.0 Hz), 2.89 (4H, m), 2.79 (1H, m), 1.02 (6H, d, J=6.2 Hz). As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 13 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 14 Preparation of Cpd 42

Step A: 2,4-Dihydroxybenzaldehyde (1.38 g, 10 mmol) was dissolved in CH₂Cl₂ (20 mL) and cooled to 0° C. To the mixture was added pyridine (0.81 mL, 10 mmol), followed by phosgene (5.0 mL, 20% in toluene, 10 mmol). The mixture was stirred for 5 min at 0° C. A solution of 1-Boc-piperazine (1.86 g, 10 mmol) and triethylamine (1.4 mL, 10 mmol) in CH₂Cl₂ (5 mL) was added to the mixture at 0° C. After 5 min, the mixture was washed with an aqueous saturated NaHCO₃ solution. The organic layer was dried over Na₂SO₄, filtered and concentrated. The residue was purified by silica gel column chromatography (20% EtOAc in hexanes) to afford 1-tert-butyl 4-(4-formyl-3-hydroxyphenyl) piperazine-1,4-dicarboxylate (480 mg, 14%). MS m/z 349.3 [M−H]⁻.

Step B: Following the procedure in Example 9, Step C, 1-tert-butyl 4-(4-formyl-3-hydroxyphenyl) piperazine-1,4-dicarboxylate (70 mg, 0.2 mmol), ethyl 2-(4-chlorobenzo [d]thiazol-2-yl)acetate (50 mg, 0.2 mmol, prepared according to Example 2, Part 1), piperidine (20 μL, 0.2 mmol) and acetic acid (12 μL, 0.2 mmol) in EtOH (1 mL) afforded 1-tert-butyl 4-(3-(4-chlorobenzo [d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl) piperazine-1,4-dicarboxylate.

Step C: A mixture of 1-tert-butyl 4-(3-(4-chlorobenzo[d]thiazol-2-yl)-2-oxo-2H-chromen-7-yl) piperazine-1,4-dicarboxylate (0.2 mmol) and trifluoroacetic acid (1 mL) was stirred at room temperature for 15 min, then the solvent was removed with a stream of nitrogen. The residue was partitioned in CH₂Cl₂ (5 mL) and aqueous K₂CO₃ (1 M, 5 mL). The organic layer was collected through a hydrophobic frit and concentrated to afford the title compound (62 mg, 70%) as an off white powder: m.p. 236-239° C.; MS m/z 442.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.23 (1H, s), 8.21-8.18 (2H, m), 7.70 (1H, d, J=7.72 Hz), 7.49 (1H, t,

J=7.9 Hz), 7.46 (1H, d, J=2.1Hz), 7.31 (1H, dd, J=8.5 Hz, 2.1Hz), 3.55 (2H, m), 3.39 (2H, m), 2.76 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 14 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 15 Preparation of Cpd 143

Step A: To a solution of 3-hydroxyacetophenone (2.72 g, 20 mmol) in MeOH (10 mL) was added sodium borohydride (380 mg, 10 mmol). After stirring at room temperature for 2 h, the reaction mixture was acidified to pH<7 with aqueous HCl (1 N). MeOH was removed by rotoevaporation under reduced pressure. The mixture was partitioned in water and EtOAc. The organic layer was washed with water, dried over MgSO₄, filtered and concentrated under reduced pressure to provide 3-(1-hydroxyethyl)phenol (2.15 g, 78%). MS m/z 137.1 [M−H]⁻. Step B: To a mixture of 3-(1-hydroxyethyl)phenol (1.38 g, 10 mmol), magnesium chloride (1.94 g, 20.4 mmol) and triethylamine (7 mL, 50 mmol) in CH₃CN (5 mL) was added paraformaldehyde (3 g, 100 mmol) at room temperature.

The reaction mixture was heated at 60° C. overnight, then the solvent was removed by rotoevaporation under reduced pressure. The residual mixture was acidified to pH -2 with aqueous HCl (1 N). The aqueous mixture was extracted with EtOAc and the organic layer was concentrated. The residue was purified by silica gel column chromatography (0-20% EtOAc in CH₂Cl₂) to provide 2-hydroxy-4-(1-hydroxyethyl) benzaldehyde (734 mg, 44%).

Step C: To a mixture of 2-hydroxy-4-(1-hydroxyethyl) benzaldehyde (568 mg, 3.4 mmol), piperidine (674 μL, 6.8 mmol) and acetic acid (194 μL, 3.4 mmol) in EtOH (2 mL) was added ethyl 2-(benzo[d]thiazol-2-yl)acetate (800 mg, 4.1 mmol, prepared in Example 1, Part 1). The mixture was heated at 60° C. overnight. After cooling to room temperature, diethyl ether was added to the mixture to produce a precipitate. The solid was collected by filtration, washed with water and dried under vacuum to give 3-(benzo[d]thiazol-2-yl)-7-(1-hydroxyethyl)-2H-chromen-2-one (493 mg, 45%). MS m/z 324.1 [M+H]⁺.

Step D: To a mixture of 3-(benzo[d]thiazol-2-yl)-7-(1-hydroxyethyl)-2H-chromen-2-one (323 mg, 1 mmol) and triphenylphosphine (525 mg, 2 mmol) in CH₂Cl₂ (2 mL) was added N-bromosuccinimide (456 mg, 2.6 mmol) at 0° C. The reaction mixture was stirred at room temperature for 3 h. Diethyl ether was added to the mixture to produce a precipitate. The precipitate was collected by vacuum filtration, washed with water and a saturated aqueous NaHCO₃ solution, and dried to give 3-(benzo[d]thiazol-2-yl)-7-(1-bromoethyl)-2H-chromen-2-one (193 mg, 50%). MS m/z 386.1, 388.1 [M+H]⁺.

Step E: To a solution of 3-(benzo[d]thiazol-2-yl)-7-(1-bromoethyl)-2H-chromen-2-one (40 mg, 0.10 mmol) in CH₃CN (0.8 mL) was added dimethylamine (16 mg, 0.36 mmol). The reaction mixture was heated at 45° C. for 2 h. Diethyl ether was added to the mixture to produce a precipitate. The solid was collected by vacuum filtration, washed with water and an aqueous saturated NaHCO₃ solution, then dried to afford the title compound (14 mg, 27%) as a yellow solid: m.p. 130-133° C.; MS m/z 351.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.25 (1H, s), 8.20 (1H, d, J=8.1Hz), 8.09 (1H, d, J=8.1Hz), 8.03 (1H, d, J=7.9 Hz), 7.59 (1H, t, J=7.6 Hz), 7.51-7.43 (3H, m), 3.46 (1H, q, J=6.7 Hz), 2.15 (6H, s), 1.32 (3H, d, J=6.7 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 15 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 16 Preparation of Cpd 50

Step A: A mixture of tert-butyl 4-(4-formyl-3-hydroxyphenyl)piperazine-1-carboxylate (6.5 g, 21.2 mmol, prepared in Example 1, Part 2), ethyl cyanoacetate (2.87 mL, 29.6 mmol), piperidine (2.6 mL, 26 mmol), AcOH (1.6 mL, 29.3 mmol) and CH₃CN (50 mL) was heated at 80° C. for 1 h. The reaction mixture was diluted with H₂O and extracted with CH₂Cl₂. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was purified by silica gel column chromatography (10% EtOAc in CH₂Cl₂), followed by trituration with hexane/EtOAc (1:1), yielding tert-butyl 4-(3-cyano-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (5.05 g, 67%) as a yellow solid. ¹H NMR (500 MHz, CDCl₃): δ 8.05 (1H, s), 7.41 (1H, d, J=8.5 Hz), 6.84 (1H, dd, J=8.5 Hz, 2.5 Hz), 6.66 (1H, d, J=2.5 Hz), 3.65 (4H, m), 3.51 (4H, m), 1.52 (9H, s). Step B: A mixture of tert-butyl 4-(3-cyano-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (400 mg, 1.13 mmol), MeOH (2 mL), CH₂Cl₂ (2 mL), and NH₂OH (50% aqueous solution, 200 μL, 3.2 mmol) was stirred at room temperature for 8 h. The reaction mixture was concentrated with a stream of nitrogen until the total volume was halved. The reaction mixture was diluted with MeOH (40 mL) and H₂O (5 mL), generating a precipitate. The precipitate was collected by vacuum filtration and dried, affording tert-butyl 4-(3-(N′-hydroxycarbamimidoyl)-2-oxo-2H-chromen-7-yl) piperazine-1-carboxylate (386 mg, 88%) as a tan solid. MS m/z 389.2 [M+H]⁺.

Step C: tert-Butyl 4-(3-(N′-hydroxycarbamimidoyl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (190 mg, 0.49 mmol) was suspended in CH₂Cl₂ (1.5 mL) and triethylamine (85 μL, 0.6 mmol). Acetyl chloride (40 μL, 0.54 mmol) was added to the mixture. After 10 min, the mixture was diluted in CH₂Cl₂ and washed with aqueous HCl, followed by an aqueous saturated NaHCO₃ solution. The organic layer was dried over MgSO₄, filtered and concentrated under vacuum. The residue was suspended in toluene (1.5 mL) and heated at 100° C. for 30 h, then the solvent was removed with a stream of nitrogen. The residue was purified by silica gel column chromatography (10% EtOAc in CH₂Cl₂), followed by trituration with 2:1 hexane/acetone, yielding tert-butyl 4-(2-oxo-3-(5-phenyl-1,2,4-oxadiazol-3-yl)-2H-chromen-7-yl)piperazine-1-carboxylate (187 mg, 50%) as a yellow solid. MS m/z 475.2 [M+H]⁺.

Step D: tert-Butyl 4-(2-oxo-3-(5-phenyl-1,2,4-oxadiazol-3-yl)-2H-chromen-7-yl)piperazine-1-carboxylate (107 mg, 0.26 mmol) was stirred in a solution of CH₂Cl₂ (2.5 mL) and trifluoroacetic acid (1.0 mL) for 15 min. The reaction mixture was partitioned in CH₂Cl₂ and aqueous K₂CO₃. The organic layer was concentrated under vacuum. The residue was triturated with 2:1 hexane/acetone, yielding the title compound (116 mg, 81%) as a yellow solid: m.p. 214-221° C.; MS m/z 375.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.77 (1H, s), 8.18 (2H, m), 7.75 (2H, m), 7.68 (2H, m), 7.04 (1H, dd, J=9 Hz, 2 Hz), 6.87 (1H, d, J=2 Hz), 3.38 (4H, m), 2.82 (4H, m).

Example 17 Preparation of Cpd 29

Step A: A mixture of tert-butyl 4-(4-formyl-3-hydroxyphenyl)piperazine-1-carboxylate (2.9 g, 9.5 mmol, prepared in Example 1, Part 2), ethyl acetoacetate (1.28 mL, 11.8 mmol), AcOH (725 μL, 13.3 mmol), piperidine (1.16 mL, 11.8 mmol), and CH₃CN (23 mL) were heated at 80° C. for 2 h. The reaction mixture was partitioned between EtOAc and H₂O. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was purified by silica gel column chromatography (10% EtOAc in CH₂Cl₂), followed by ether trituration, yielding tert-butyl 4-(3-acetyl-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (3.15 g, 89%) as a yellow solid. ¹H NMR (500 MHz, CDCl₃): δ 8.47 (1H, s), 7.49 (1H, d, J=9 Hz), 6.83 (1H, dd, J=9 Hz, 2.5 Hz), 6.67 (1H, d, J=2.5 Hz), 3.64 (4H, m), 3.47 (4H, m), 2.72 (3H, s), 1.52 (9H, s).

Step B: A mixture of tert-butyl 4-(3-acetyl-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (300 mg, 0.81 mmol), dimethylformamide dimethyl acetal (900 μL, 7.5 mmol) and pyrrolidine (150 μL, 1.83 mmol) was heated at 55° C. for 1 h, then the solvent was removed with a stream of nitrogen. Hydrazine (70 μL, 2.2 mmol) and AcOH (900 μL) were added. The mixture was stirred at room temperature for 45 min, then partitioned between EtOAc and H₂O. The organic layer was dried over MgSO₄, then filtered and concentrated under vacuum. The residue was purified by silica gel column chromatography (30% EtOAc in CH₂Cl₂), followed by trituration with 2:1 hexane/acetone, yielding tert-butyl 4-(2-oxo-3-(1H-pyrazol-3-yl)-2H-chromen-7-yl) piperazine-1-carboxylate (180 mg, 56%) as a yellow solid. MS m/z 397.2 [M+H]⁺.

Step C: A solution of tert-butyl 4-(2-oxo-3-(1H-pyrazol-3-yl)-2H-chromen-7-yl)piperazine-1-carboxylate (180 mg, 0.45 mmol) in CH₂Cl₂ (2.5 mL) and trifluoroacetic acid (1.0 mL) was stirred at room temperature for 15 min. The reaction mixture was partitioned between CH₂Cl₂ and aqueous K₂CO₃. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. Trituration of the residue with acetone yielded the title compound (100 mg, 75%) as a yellow solid: m.p. 224-228° C.; MS m/z 297.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆:D₂O, 100° C.): δ 8.31 (1H, s), 7.63 (1H, br s), 7.54 (1H, d, J=9 Hz), 6.94 (1H, dd, J=9 Hz, 2 Hz), 6.82 (1H, d, J=2 Hz), 6.77 (1H, d, J=2 Hz), 3.32 (4H, t, J=5 Hz), 2.88 (4H, t, J=5 Hz).

Example 18 Preparation of Cpd 38

Step A: A mixture of tert-butyl 4-(2-oxo-3-(1H-pyrazol-3-yl)-2H-chromen-7-yl)piperazine-1-carboxylate (300 mg, 0.76 mmol, prepared in Example 17, Step B), Cs₂CO₃ (515 mg, 1.58 mmol), iodomethane (93 μL, 1.5 mmol), and DMF (2.0 mL) was stirred at 5° C. for 22 h. The reaction mixture was partitioned between EtOAc and H₂O. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was purified by silica gel column chromatography (15% EtOAc in CH₂Cl₂), followed by trituration with ether to give tert-butyl 4-(3-(1-methyl-1H-pyrazol-3-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (215 mg, 69%) as a yellow solid. ¹H NMR (500 MHz, CDCl₃): δ 8.32 (1H, s), 7.41 (2H, m), 7.05 (1H, d, J=2 Hz), 6.83 (1H, dd, J=8.5 Hz, 2.5 Hz), 6.74 (1H, d, J=2 Hz), 3.97 (3H, s), 3.62 (4H, m), 3.33 (4H, m), 1.50 (9H, s). Step B: A solution of tert-butyl 4-(3-(1-methyl-1H-pyrazol-3-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (215 mg, 0.52 mmol) in CH₂Cl₂ (2.5 mL) and trifluoroacetic acid (1.0 mL) was stirred at room temperature for 1 h. The reaction mixture was partitioned between CH₂Cl₂ and aqueous K₂CO₃. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was triturated with 1:1 hexane/acetone affording the title compound (142 mg, 92%) as a yellow solid: m.p. 224-228° C.; MS m/z 311.1 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.32 (1H, s), 7.42 (2H, m), 7.06 (1H, d, J=2 Hz), 6.85 (1H, dd, J=9 Hz, 2.5 Hz), 6.77 (1H, d, J=2 Hz), 3.99 (3H, s), 3.34 (4H, m), 3.06 (4H, m).

Example 19 Preparation of Cpd 74

Step A: A mixture of tert-butyl 4-(2-oxo-3-(1H-pyrazol-3-yl)-2H-chromen-7-yl)piperazine-1-carboxylate (250 mg, 0.63 mmol, prepared in Example 17, Step B), Cs₂CO₃ (650 mg, 1.98 mmol), copper(I) iodide (14 mg, 0.073 mmol), iodobenzene (110 μL, 0.97 mmol), and DMF (1.6 mL) was heated at 100° C. for 24 h. The reaction mixture was partitioned between EtOAc and H₂O. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was purified by silica gel column chromatography (5% EtOAc in CH₂Cl₂), followed by ether trituration to yield tert-butyl 4-(2-oxo-3-(1-phenyl-1H-pyrazol-3-yl)-2H-chromen-7-yl)piperazine-1-carboxylate (129 mg, 43%) as a yellow solid. ¹H NMR (500 MHz, CDCl₃): δ 8.52 (1H, s), 7.97 (1H, d, J=2.5 Hz), 7.77 (2H, d, J=8 Hz), 7.49 (3H, m), 7.32 (2H, m), 6.86 (1H, dd, J=8.5 Hz, 2.5 Hz), 6.77 (1H, d, J=2.5 Hz), 3.62 (4H, m), 3.36 (4H, m), 1.50 (9H, s).

Step B: A solution of tert-butyl 4-(2-oxo-3-(1-phenyl-1H-pyrazol-3-yl)-2H-chromen-7-yl)piperazine-1-carboxylate (127 mg, 0.27 mmol) in CH₂Cl₂ (2.5 mL) and trifluoroacetic acid (1.0 mL) was stirred at room temperature for 1 h. The reaction mixture was partitioned between CH₂Cl₂ and aqueous K₂CO₃. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was triturated with 2:1 hexane/acetone to afford 3-(1-phenyl-1H-pyrazol-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one (85 mg, 84%) as a yellow solid. MS m/z 373.3 [M+H]⁺.

Step C: 3-(1-phenyl-1H-pyrazol-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one (55 mg, 0.15 mmol) was combined with aqueous formaldehyde (37%, 200 uL, 2.15 mmol) and sodium triacetoxyborohydride (110 mg, 0.52 mmol) in 1,2-dichloroethane (0.5 mL). The mixture was stirred 20 min at room temperature, and then quenched by the addition of an aqueous saturated NaHCO₃ solution. The mixture was extracted with CH₂Cl₂. The organic layer was, dried over NaSO₄, filtered, concentrated and purified by silica gel column chromatography (10% MeOH in CH₂Cl₂) to give the title compound (34 mg, 58%) as a yellow solid: m.p. 152-159° C.; MS m/z 387.3 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.51 (1H, s), 7.97 (1H, d, J=2.5 Hz), 7.77 (2H, d, J=7.5 Hz), 7.47 (3H, m), 7.32 (2H, m), 6.86 (1H, dd, J=8.5 Hz), 6.77 (1H, d, J=2 Hz), 3.45 (4H, m), 2.66 (4H, br s), 2.43 (3H, s).

Example 20 Preparation of Cpd 80

Step A: A mixture of tert-butyl 4-(4-formyl-3-hydroxyphenyl)piperazine-1-carboxylate (3.0 g, 9.8 mmol, prepared in Example 1, Part 2), ethyl 3-oxopentanoate (1.62 mL, 11.3 mmol), AcOH (650 μL, 12 mmol), piperidine (1.1 mL, 11.3 mmol), and CH₃CN (24 mL) were heated at 80° C. for 4 h. The reaction mixture was partitioned between CH₂Cl₂ and H₂O. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was purified by silica gel column chromatography (10% EtOAc in CH₂Cl₂), followed by ether trituration, yielding tert-butyl 4-(2-oxo-3-propionyl-2H-chromen-7-yl)piperazine-1-carboxylate (3.6 g, 95%) as a yellow solid. ¹H NMR (500 MHz, CDCl₃): 8 8.49 (1H, s), 7.50 (1H, d, J=8.5 Hz), 6.83 (1H, dd, J=8.5 Hz, 2.5 Hz), 6.67 (1H, d, J=2 Hz), 3.63 (4H, m), 3.47 (4H, m), 3.16 (2H, q, J=7 Hz), 1.52 (9H, s), 1.19 (3H, t, J=7 Hz).

Step B: A mixture of tert-butyl 4-(2-oxo-3-propionyl-2H-chromen-7-yl)piperazine-1-carboxylate (3.3 g, 8.55 mmol), dimethylformamide dimethyl acetal (10 mL, 830 mmol) and pyrrolidine (1.65 mL, 20.1 mmol) was heated at 60° C. for 3 h, then the solvent was removed under vacuum. The reaction mixture was dissolved in AcOH (10 mL) and cooled to 0° C. Hydrazine (820 μL, 26 mmol) was added dropwise (mild exotherm). After the addition was complete, the mixture was stirred at room temperature for 10 min. The reaction mixture was partitioned between CH₂Cl₂ and aqueous K₂CO₃. The organic layer was dried over MgSO₄, then filtered, and concentrated under vacuum. The residue was purified by silica gel column chromatography (50% EtOAc in CH₂Cl₂), followed by trituration with 2:1 hexane/acetone, yielding tert-butyl 4-(3-(4-methyl-1H-pyrazol-3-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (1.01 g, 29%) as a yellow solid. ¹H NMR (500 MHz, CDCl₃): δ 7.95 (1H, s), 7.48 (1H, s), 7.44 (1H, d, J=9 Hz), 6.87 (1H, dd, J=8.5 Hz, 2.5 Hz), 6.74 (1H, d, J=2.5 Hz), 3.63 (4H, m), 3.38 (4H, m), 2.36 (3H, s), 1.50 (9H, s).

Step C: A solution of tert-butyl 4-(3-(4-methyl-1H-pyrazol-3-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (250 mg, 0.61 mmol) in CH₂Cl₂ (2.5 mL) and trifluoroacetic acid (1.0 mL) was stirred at room temperature for 15 min. The reaction mixture was partitioned between CH₂Cl₂ and aqueous K₂CO₃. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was triturated with 1:1 hexane/acetone yielding the title compound (155 mg, 82%) as a yellow solid: m.p. 175-200° C. (decomposition range); MS m/z 311.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆:D₂O, 100° C.): δ 7.91 (1H, s), 7.54 (1H, d, J=9 Hz), 7.41 (1H, br s), 6.95 (1H, d, J=9 Hz), 6.80 (1H, d, J=2.5 Hz), 3.35 (4H, m), 2.92 (4H, m), 2.09 (3H, br s).

Example 21 Preparation of Cpd 283

Step A: Hydrogen sulfide gas (H₂S) was bubbled into a solution of ethyl cyanoacetate (4.7 mL, 44.3 mmol) in pyridine/triethylamine (500 mL, 1:1 v/v) until it became saturated. The mixture was heated at 60° C. for 18 h, then the solvent was removed under vacuum. The residue was partitioned between EtOAc and aqueous HCl. The organic layer was dried over MgSO₄, then filtered and concentrated under vacuum. The resulting oil was filtered to remove solid impurities. Ethyl 3-amino-3-thioxopropanoate (6.25 g, 96%) was obtained as an orange oil. ¹H NMR (500 MHz, CDCl₃): δ 8.92 (1H, br s), 7.75 (1H, br s), 4.21 (2H, q, J=7 Hz), 3.82 (2H, s), 1.29 (3H, t, J=7 Hz).

Step B: A solution of ethyl 3-amino-3-thioxopropanoate (2.0 g, 13.6 mmol) and chloroacetone (1.2 mL, 15.0 mmol) in DMF (230 mL) was heated at 105° C. for 15 h. The reaction mixture was partitioned between EtOAc and H₂O. The organic layer was dried over MgSO₄, filtered and concentrated under vacuum. The residue was purified by silica gel column chromatography (CH₂Cl₂) yielding ethyl 2-(4-methylthiazol-2-yl)acetate (1.22 g, 48%) as a red oil. H NMR (500 MHz, CDCl₃): δ 6.86 (1H, s), 4.24 (2H, q, J=7 Hz), 4.03 (2H, s), 2.44 (3H, s), 1.29 (3H, t, J=7 Hz).

Step C: A mixture of ethyl 2-(4-methylthiazol-2-yl)acetate (650 mg, 3.5 mmol), 4-fluoro-2-hydroxybenzaldehyde (490 mg, 3.5 mmol), piperidine (15 μL, 0.15 mmol), AcOH (15 μL, 0.27 mmol) and CH₃CN (5 mL) was heated at 80° C. for 24 h. The reaction mixture was partitioned between CH₂Cl₂ and aqueous K₂CO₃. The organic layer was dried over MgSO₄, filtered and concentrated under vacuum. The residue was triturated with 7:3 hexane/CH₂Cl₂ yielding 7-fluoro-3-(4-methylthiazol-2-yl)-2H-chromen-2-one (642 mg, 70%) as a yellow solid. ¹H NMR (500 MHz, CDCl₃): δ 8.85 (1H, s), 7.69 (1H, dd, J=8.5 Hz, 6 Hz), 7.15 (3H, m), 2.57 (3H, s).

Step D: A mixture of 7-fluoro-3-(4-methylthiazol-2-yl)-2H-chromen-2-one (100 mg, 0.38 mmol), (S)-2-methylpiperazine (46 mg, 0.46 mmol) and DMSO (600 μL) was heated at 80° C. for 15 h. The reaction mixture was diluted in an aqueous saturated NaHCO₃ solution and filtered. The collected material was purified by silica gel column chromatography (10% MeOH in CH₂Cl₂), followed by trituration with 1:1 hexane/acetone to yield the title compound (103 mg, 79%) as a yellow solid: m.p. 194-199° C.; MS m/z 342.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.80 (1H, s), 7.75 (1H, d, J=9 Hz), 7.32 (1H, m), 7.06 (1H, dd, J=9 Hz, 2.5 Hz), 6.91 (1H, d, J=2.5 Hz), 3.88 (2H, t, J=11Hz), 2.96 (1H, d, J=12 Hz), 2.81 (1H, td, J=12 Hz, 3 Hz), 2.72 (2H, m), 2.45 (4H, m), 2.36 (1H, br s), 1.04 (3H, d, J=6.5 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 21 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 22 Preparation of Cpd 452

Step A: A mixture of 4-fluoro-2-hydroxybenzaldehyde (10 g, 71.4 mmol), acetic anhydride (34 mL, 360 mmol), and triethylamine (11 mL, 79 mmol) was heated at 145° C. for 2 d. The reaction mixture was diluted in aqueous NH₄OH (500 mL) and filtered. The collected material was dried, yielding 7-fluoro-2H-chromen-2-one (10.3 g, 88%) as a brown solid. ¹H NMR (500 MHz. CDCl₃): δ 7.69 (1H, d, J=9.5 Hz), 7.48 (1H, dd, J=8.5 Hz, 6 Hz), 7.07 (1H, dd, J=8.5 Hz, 2.5 Hz), 7.03 (1H, td, J=8.5 Hz, 2.5 Hz), 6.38 (1H, d, J=9.5 Hz).

Step B: A mixture of 7-fluoro-2H-chromen-2-one (4.33 g, 26.4 mmol), [bis(trifluoroacetoxy)iodo]benzene (18.15 g, 42.2 mmol), iodine (10.7 g, 42.2 mmol), pyridine (4.2 mL, 53 mmol), and CHCl₃ (25 mL) was heated at 65° C. for 15 h. The reaction mixture was partitioned between aqueous NaHSO₃ and CH₂Cl₂. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was purified by silica gel column chromatography (50% CH₂Cl₂ in hexanes, then CH₂Cl₂) yielding 7-fluoro-3-iodo-2H-chromen-2-one (5.6 g, 73%) as a tan solid. ¹H NMR (500 MHz, CDCl₃): δ 8.36 (1H, s), 7.46 (1H, dd, J=9 Hz, 6 Hz), 7.07 (2H, m).

Step C: A mixture of 7-fluoro-3-iodo-2H-chromen-2-one (5.6 g, 19.3 mmol), hexabutylditin (13.45 g, 23.2 mmol), bis(triphenylphosphine)palladium(II) dichloride (540 mg, 0.77 mmol) and 1,4-dioxane (55 mL) was heated at 80° C. for 15 h. The reaction mixture was diluted in EtOAc and filtered. The filtrate was concentrated under vacuum. The residue was purified by silica gel column chromatography (20-40% CH₂Cl₂ in hexanes) yielding 7-fluoro-3-(tributylstannyl)-2H-chromen-2-one (6.79 g, 77%) as a colorless oil.

Step D: A mixture of 7-fluoro-3-(tributylstannyl)-2H-chromen-2-one (1.15 g, 2.53 mmol), 4-iodoimidazole (600 mg, 3.1 mmol), bis(triphenylphosphine)palladium(II) dichloride (285 mg, 0.41 mmol), copper(I) iodide (115 mg, 0.60 mmol), and 1,4-dioxane (7 mL) was heated at 85° C. for 2 d. The reaction mixture was partitioned between NH₄OH and CH₂Cl₂. The organic layer was concentrated under vacuum. The residue was purified by silica gel column chromatography (30% MeOH in CH₂Cl₂). The product was triturated with CH₂Cl₂, yielding 7-fluoro-3-(1H-imidazol-4-yl)-2H-chromen-2-one (298 mg, 51%) as a yellow solid. MS m/z 231.1 [M+H]⁺.

Step E: A mixture of 7-fluoro-3-(1H-imidazol-4-yl)-2H-chromen-2-one (90 mg, 0.39 mmol), iodobenzene (70 μL, 0.62 mmol), CuI (60 mg, 0.32 mmol), trans-1,2-bis(methylamino)cyclohexane (23 μL, 0.15 mmol), Cs₂CO₃ (585 mg, 1.79 mmol) and DMF (0.9 mL) was heated at 50° C. for 45 min. The reaction mixture was diluted in H₂O and filtered. The solid material was partitioned between aqueous NH₄OH and CH₂Cl₂. The organic layer was concentrated under vacuum. The residue was purified by silica gel chromatography (10% EtOAc in CH₂Cl₂), yielding 7-fluoro-3-(1-phenyl-1H-imidazol-4-yl)-2H-chromen-2-one (52 mg, 43%) as a white solid. ¹H NMR (500 MHz, CDCl₃): δ 8.58 (1H, s), 8.27 (1H, d, J=1.5 Hz), 7.94 (1H, d, J=1.5 Hz), 7.60 (1H, dd, J=8.5 Hz, 6 Hz), 7.52 (4H, m), 7.42 (1H, m), 7.11 (1H, dd, J=9 Hz, 2.5 Hz), 7.06 (1H, td, J=8 Hz, 2.5 Hz).

Step F: A mixture of 7-fluoro-3-(1-phenyl-1H-imidazol-4-yl)-2H-chromen-2-one (50 mg, 0.16 mmol), cis-2,6-dimethylpiperazine (29 mg, 0.25 mmol) and DMSO (300 μL) were heated at 100° C. for 15 h. The reaction mixture was diluted in an aqueous saturated NaHCO₃ solution and filtered. The solid material was purified by silica gel column chromatography (5% MeOH in CH₂Cl₂), yielding the title compound (52 mg, 81%) as a yellow solid: m.p. 260-264° C.; MS m/z 401.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.50 (1H, s), 8.41 (1H, d, J=1Hz), 8.14 (1H, d, J=1Hz), 7.71 (2H, d, J=8.5 Hz), 7.64 (1H, d, J=9 Hz), 7.55 (2H, t, J=8 Hz), 7.40 (1H, t, J=7.5 Hz), 7.01 (1H, dd, J=9 Hz, 2 Hz), 6.89 (1H, d, J=2 Hz), 3.82 (2H, dd, J=12.5 Hz, 2 Hz), 2.80 (2H, m), 2.31 (2H, t, J=11.5 Hz), 2.25 (1H, br s), 1.04 (6H, d, J=6.5 Hz).

Example 23 Preparation of Cpd 433

Step A: A mixture of 7-fluoro-3-(1H-imidazol-4-yl)-2H-chromen-2-one (75 mg, 0.32 mmol, prepared in Example 22, Step D), 2-iodopyridine (55 μL, 0.5 mmol), copper(I) iodide (27 mg, 0.14 mmol), trans-1,2-bis(methylamino)cyclohexane (13 μL, 0.08 mmol), Cs₂CO₃ (330 mg, 1.01 mmol) and DMF (750 μL) was heated at 50° C. for 30 min. The reaction mixture was diluted with H₂O and filtered. The solid material was partitioned between aqueous NH₄OH and CH₂Cl₂. The organic layer was concentrated under vacuum. The residue was purified by silica gel column chromatography (10% acetone in CH₂Cl₂), followed by trituration with 1:1 CH₂Cl₂/hexane, yielding 7-fluoro-3-(1-(pyridin-2-yl)-1H-imidazol-4-yl)-2H-chromen-2-one (62 mg, 63%) as a white solid. ¹H NMR (500 MHz, CDCl₃): δ 8.61 (1H, s), 8.56 (1H, d, J=1Hz), 8.52 (1H, m), 8.50 (1H, d, J=1Hz), 7.88 (1H, m), 7.60 (1H, dd, J=8.5 Hz, 6 Hz), 7.48 (1H, d, J=8.5 Hz), 7.29 (1H, m), 7.11 (1H, dd, J=9 Hz, 2.5 Hz), 7.06 (1H, td, J=8.5 Hz, 2.5 Hz).

Step B: Following the procedure from Example 22, Step F, 7-fluoro-3-(1-(pyridin-2-yl)-1H-imidazol-4-yl)-2H-chromen-2-one (40 mg, 0.13 mmol), cis-2,6-dimethylpiperazine (23 mg, 0.2 mmol), and DMSO (300 μL) yielded the title compound (46 mg, 88%): m.p. 201-206° C.; MS m/z 402.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.71 (1H, d, J=1Hz), 8.55 (1H, m), 8.52 (1H, s), 8.45 (1H, d, J=1Hz), 8.02 (1H, m), 7.92 (1H, d, J=8.5 Hz), 7.64 (1H, d, J=9 Hz), 7.41 (1H, dd, J=6.5 Hz, 5 Hz), 7.02 (1H, dd, J=9 Hz, 2 Hz), 6.88 (1H, d, J=2.5 Hz), 3.82 (2H, d, J=11.5 Hz), 2.80 (2H, m), 2.32 (2H, t, J=11.5 Hz), 2.28 (1H, br s), 1.04 (6H, d, J=6.5 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 23 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 24 Preparation of Cpd 32

Step A: Into a suspension of 7-hydroxycoumarin (16.2 g, 100 mmol) in pyridine (16.3 mL, 200 mmol) and CH₂Cl₂ (250 mL) at 0° C. was added dropwise a solution of triflic anhydride (20.2 mL, 120 mmol) in CH₂Cl₂ (50 mL). The mixture warmed to room temperature over 30 min. The mixture was washed with dilute aqueous HCl, water, brine, and then dried over NaSO₄ and concentrated to give a solid 2-oxo-2H-chromen-7-yl trifluoromethanesulfonate (28.5 g, 97%) as a tan solid. MS m/z 295.0 [M+H]⁺.

Step B: A mixture of palladium(II) acetate (0.228 g, 1.02 mmol), 2,2′-bis(diphenylphophino)-1,1′-binaphthalene (1.27 g, 2.04 mmol) and Cs₂CO₃ (8.3 g, 25.5 mmol) in toluene (75 mL) was stirred under Argon at 110° C. for 15 min until a dark red color formed. The mixture was cooled to room temperature, upon which 2-oxo-2H-chromen-7-yl trifluoromethanesulfonate (5.0 g, 17 mmol) and 1-Boc-piperazine (3.8 g, 20.4 mmol) were added. The mixture was stirred at 110° C. for 24 h. The mixture was partitioned in EtOAc and water. The organic layer was dried over NaSO₄, filtered, concentrated and purified by silica gel column chromatography (0-15% EtOAc in CH₂Cl₂) to give tert-butyl 4-(2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (2.5 g, 45%) as a yellow solid. MS m/z 331.2 [M+H]⁺. Step C: Into a mixture of tert-butyl 4-(2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (2.5 g, 7.58 mmol) and sodium acetate (1.86 g, 22.7 mmol) in acetic acid (30 mL) at room temperature was added bromine (0.4 mL, 7.95 mmol) dropwise. The mixture was stirred at room temperature for 1 h. Water was added to produce a precipitate. The solid was collected by vacuum filtration, washed with water, dried and purified by silica gel column chromatography (0-25% EtOAc in CH₂Cl₂) to give tert-butyl 4-(3-bromo-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (1.8 g, 58%) as a yellow solid. MS m/z 409.1 [M+H]⁺, 411.1 [M+2+H]⁺.

Step D: A mixture of tert-butyl 4-(3-bromo-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (80 mg, 0.2 mmol), 2-aminopyridine (26 mg, 0.28 mmol), bis(dibenzylideneacetone)palladium(0) (3.7 mg, 0.004 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (5.1 mg, 0.0088 mmol) and Cs₂CO₃ (91 mg, 0.28 mmol) in 1,4-dioxane (1.0 mL) was stirred at 100° C. overnight under Argon, then the solvent was removed. The residue was purified by silica gel column chromatography (0-10% EtOAc in CH₂Cl₂) to give tert-butyl 4-(2-oxo-3-(pyridin-2-ylamino)-2H-chromen-7-yl)piperazine-1-carboxylate (82 mg, 71%) as a yellow solid. MS m/z 423.2 [M+H]⁺.

Step E: tert-Butyl 4-(2-oxo-3-(pyridin-2-ylamino)-2H-chromen-7-yl)piperazine-1-carboxylate (71 mg, 0.168 mmol) was dissolved in trifluoroacetic acid (2.0 mL). The mixture was stirred for 15 min at room temperature, then the solvent was removed with a stream of nitrogen. The residue was partitioned in CH₂Cl₂ and aqueous K₂CO₃. The organic layer was dried over NaSO₄, filtered and concentrated to give the title compound (41 mg, 76%) as a yellow solid: m.p. 191-194° C.; MS m/z 323.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.78 (1H, s), 8.77 (1H, s), 8.69 (1H, s), 8.24 (1H, dd, J=5.1Hz, 1.3 Hz), 7.62-7.57 (1H, m), 7.44 (1H, d, J=8.8 Hz), 7.27 (1H, d, J=8.5 Hz), 6.95 (1H, dd, J=8.8 Hz, 2.2 Hz), 6.85-6.80 (2H, m), 3.20-3.13 (4H, m), 2.86-2.78 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 24 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 25 Preparation of Cpd 274

Step A: To a solution of t-butyl 4-(3-acetyl-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (1.42 g, 3.8 mmol, prepared in Example 17, Step A) in 1,4-dioxane (8 mL) was added N,N-dimethylformamide dimethylacetal (6 mL, 44.7 mmol). The mixture was heated at 100° C. for 3 h. The reaction mixture was concentrated under reduced pressure. The residue was triturated with ether-hexane (1:1), producing a precipitate. The solid was collected by vacuum filtration, washed with ether-hexane and dried under nitrogen, affording (E)-tert-butyl 4-(3-(3-(dimethylamino)acryloyl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (1.5 g, 92%) as an orange powder. MS m/z 428.4 [M+H]⁺.

Step B: To a solution of (E)-t-butyl 4-(3-(3-(dimethylamino)acryloyl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (171 mg, 0.40 mmol) and acetamidine hydrochloride (151 mg, 1.6 mmol) in CH₃CN (2 mL) was added K₂CO₃ (110 mg, 0.80 mmol). The mixture was heated to 100° C. for 16 h. After cooling to room temperature, water (10 mL) was added to the mixture, producing a precipitate. The precipitate was collected by vacuum filtration, washed with water and dried under nitrogen to afford t-butyl-4-(3-(2-methylpyrimidin-4-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (148 mg, 88%). MS m/z 423.3 [M+H]⁺.

Step C: To a suspension of t-butyl-4-(3-(2-methylpyrimidin-4-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (182 mg, 0.42 mmol) in CH₂Cl₂ (1 mL) was added 4N HCl in 1,4-dioxane (1 mL). The mixture was stirred for 2 h at room temperature. The suspension was diluted with ether (10 mL) and filtered. The solid was washed with ether and dried under nitrogen to afford the title compound (140 mg, 91%) as a yellow solid: m.p. 200° C. (decomp.); MS m/z 323.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.13 (2H, br), 9.05 (1H, s), 8.78 (1H, d, J=5.4 Hz), 8.22 (1H, d, J=5.4 Hz), 7.88 (1H, d, J=8.8 Hz), 7.12 (1H, dd, J=8.8 Hz, 2.5 Hz), 7.03 (1H, d, J=2.2 Hz), 3.73 (4H, m), 3.24 (4H, m), 2.71 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 25 by so substituting the appropriate starting materials, reagents and reaction conditions.

Example 26 Preparation of Cpd 316

Step A: To a pressure vessel were added, 4-fluoro-2-hydroxybenzaldehyde (0.5 g, 3.6 mmol), 2-(3,4-dimethoxyphenyl)acetic acid (1.4 g, 7.2 mmol), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (1.5 g, 7.9 mmol), diisopropylethylamine (2.3 mL, 14.3 mmol) and CH₂Cl₂ (10 mL). The mixture was stirred at 60° C. for 1 h, then quenched with an aqueous saturated NaHCO₃ solution (50 mL) and extracted with EtOAc three times. The combined extracts were dried over Na₂SO₄ and concentrated under vacuum. The residue was purified by silica gel column chromatography (0-5% EtOAc in CH₂Cl₂) to give 343,4-dimethoxyphenyl)-7-fluoro-2H-chromen-2-one (1.0 g, 95%). MS m/z 301.0 [M+H]⁺.

Step B: A mixture of 3-(3,4-dimethoxyphenyl)-7-fluoro-2H-chromen-2-one (40 mg, 0.13 mmol), piperazine (34 mg, 0.40 mmol) and DMSO (0.3 mL) was stirred at 80° C. overnight. After cooling to room temperature, the mixture was diluted with water (5 mL) to produce a precipitate. The precipitate was collected by filtration, washed with water and ethyl ether, and dried to give the title compound (14 mg, 29%) as yellow powder: m.p. 168-170° C.; MS m/z 367.2 [M+H]⁺; NMR (500 MHz, CDCl₃): δ 7.69 (1H, s), 7.38 (1H, d, J=8.8 Hz), 7.31 (1H, d, J=1.9 Hz), 7.25 (1H, d, J=2.2 Hz), 6.93 (1H, d, J=8.5 Hz), 6.85 (1H, dd, J=8.8 Hz, 2.5 Hz), 6.77 (1H, d, J=2.5 Hz), 3.95 (3H, s), 3.93 (3H, s), 3.36-3.32 (4H, m), 3.10-3.05 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 26 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 27 Preparation of Cpd 385

Step A: To a suspension of tert-butyl 4-(3-(6-fluoropyridin-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (90 mg, 0.21 mmol, prepared according to Example 26) in isopropanol (1 mL) was added NaH (19 mg, 60% in mineral oil, 0.48 mmol). The mixture was stirred at 90° C. for 2 h, diluted with water and extracted with dichloromethane. The organic layer was concentrated and purified by silica gel column chromatography (0-10% MeOH in CH₂Cl₂) to give tert-butyl 4-(3-(6-isopropoxypyridin-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (50 mg, 51%). MS 466.3 m/z [M+H]⁺.

Step B: tert-Butyl 4-(3-(6-isopropoxypyridin-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (50 mg, 0.11 mmol) was stirred with 50% TFA in CH₂Cl₂ (1.0 mL) at room temperature overnight. Aqueous K₂CO₃ (2M solution) was added to the mixture, until the aqueous layer became basic, pH ˜9. The organic layer was separated and the aqueous layer was extracted with CH₂Cl₂. The combined organics were dried over Na₂SO₂ and concentrated to provide the title compound (37 mg, 82%) as a yellow powder: m.p. 177-180° C.; MS 366.3 m/z [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.67 (1H, s), 8.06 (1H, dd, J=7.6 Hz, 0.6 Hz), 7.63 (1H, dd, J=8.2 Hz, 7.6 Hz), 7.49 (1H, d, J=8.8 Hz), 6.86 (1H, dd, J=8.7 Hz, 2.4 Hz), 6.75 (1H, d, J=2.2 Hz), 6.65 (1H, dd, J=8.2 Hz, 0.6 Hz), 5.43 (1H, t, J=6.3 Hz), 3.41-3.31 (4H, m), 3.10-3.00 (4H, m), 1.42 (6H, d, J=6.3 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 27 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 28 Preparation of Cpd 386

Step A: A mixture of tert-butyl 4-(3-(6-fluoropyridin-2-yl)-2-oxo-2H-chromen-7-yl)piperazine-1-carboxylate (90 mg, 0.21 mmol, prepared according to Example 26) and pyrrolidine (1 mL) was stirred at 80° C. for 2 h. The mixture was diluted with water (10 mL) and extracted with dichloromethane. The organic layer was concentrated and purified by silica gel column chromatography (0-10% MeOH in CH₂Cl₂) to give tert-butyl 4-(2-oxo-3-(6-(pyrrolidin-1-yl) pyridin-2-yl)-2H-chromen-7-yl)piperazine-1-carboxylate (56 mg, 50%). MS 477.0 m/z [M+H]⁺.

Step B: tert-Butyl 4-(2-oxo-3-(6-(pyrrolidin-1-yl)pyridin-2-yl)-2H-chromen-7-yl)piperazine-1-carboxylate was stirred with 50% TFA in CH₂Cl₂ (1.0 mL) at room temperature overnight. Aqueous K₂CO₃ (2M solution) was added to the mixture, until the aqueous layer became basic, pH ˜9. The organic layer was separated and the aqueous layer was extracted with CH₂Cl₂. The combined organics were dried over Na₂SO₂ and concentrated to provide the title compound (63 mg, 80%) as yellow powder: m.p. 190-192° C.; MS 377.3 m/z [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.72 (1H, s), 7.73 (1H, d, J=7.3 Hz), 7.54-7.44 (2H, m), 6.84 (1H, dd, J=8.8 Hz, 2.5 Hz), 6.75 (1H, d, J=2.2 Hz), 6.40-6.33 (1H, m), 3.60-3.50 (4H, m), 3.33 (4H, dd, J=6.2 Hz, 4.3 Hz), 3.10-3.01 (4H, m), 2.04 (4H, dt, J=6.5 Hz, 3.4 Hz).

Example 29 Preparation of Cpd 445

Step A: A mixture of 7-fluoro-3-(6-fluoropyridin-2-yl)-2H-chromen-2-one (260 mg, 1.0 mmol, prepared according to Example 26) and NaSMe (105 mg, 1.5 mmol) in DMF (2 mL) was stirred at room temperature for 1 h. The mixture was diluted with water (10 mL) to produce a precipitate. The precipitate was collected by filtration, washed with water and CH₂Cl₂, and dried to give 7-fluoro-3-(6-(methylthio) pyridin-2-yl)-2H-chromen-2-one (100 mg, 35%). MS 288.3 m/z [M+H]⁺.

Step B: A mixture of 7-fluoro-3-(6-(methylthio)pyridin-2-yl)-2H-chromen-2-one (50 mg, 0.17 mmol), piperazine (44 mg, 0.51 mmol) and DMSO (0.5 mL) was stirred at 80° C. overnight. After cooling to room temperature, the mixture was diluted with water (5 mL) to produce a precipitate. The precipitate was collected by filtration, washed with water and ethyl ether, and dried to give the title compound (18 mg, 30%): m.p. 180-183° C.; MS m/z 354.3 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.69 (1H, s), 7.84 (1H, d, J=7.3 Hz), 7.59 (1H, dd, J=8.5 Hz, 7.6 Hz), 7.53 (1H, d, J=8.8 Hz), 7.17-7.13 (2H, m), 6.71 (1H, s), 3.63-3.61 (4H, m), 3.09-3.03 (4H, m), 2.58-2.54 (3H, m).

Example 30 Preparation of Cpd 187

Step A: A mixture of ethyl 2-(2-ethoxy-2-oxoethyl)pyrazolo[1,5-a]pyridine-3-carboxylate (1.2 g, 4.3 mmol, prepared from 1-aminopyridinium iodide and diethyl 3-oxo-pentanedioate according to the procedure in Japanese Patent 62-267285, 1986), NaOH (3 N, 8.6 mL) and THF (10 mL) was heated at 60° C. for 15 h. The mixture was cooled to room temperature and washed with EtOAc. The aqueous phase was acidified with aqueous HCl (6 N) to pH 3, producing a precipitate. The precipitate was collected by vacuum filtration, washed with water and dried to give 2-(carboxymethyl)pyrazolo[1,5-a]pyridine-3-carboxylic acid (0.63 g, 66%) as a white solid. MS m/z 221.1 [M+H]⁺.

Step B: To a suspension of 2-(carboxymethyl)pyrazolo[1,5-a]pyridine-3-carboxylic acid (0.63 g, 2.9 mmol) in water (5 mL) was added conc. H₂SO₄ (5 mL). The clear solution was heated at 80° C. for 15 h. The solution was cooled to room temperature. Aqueous NaOH (1 N) was added to the solution until pH 2-3 was reached. A precipitate formed. The precipitate was collected by vacuum filtration, washed with water and dried to give 2-(pyrazolo[1,5-a]pyridin-2-yl)acetic acid (0.435 g, 86%) as a white solid. MS m/z 177.1 [M+H]⁺.

Step C: A mixture of 2-(pyrazolo[1,5-a]pyridin-2-yl)acetic acid (0.435 g, 2.47 mmol)), 4-fluoro-2-hydroxybenzaldehyde (0.363 g, 2.59 mmol), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.57 g, 2.96 mmol), 4-(dimethylamino)pyridine (61 mg, 0.5 mmol) and triethylamine (0.7 mL, 5.0 mmol) in CH₂Cl₂ (8 mL) was heated at 50° C. After 1 h, the mixture was concentrated. The residue was suspended in CH₃CN, collected by vacuum filtration, washed with CH₃CN and dried to give 7-fluoro-3-(pyrazolo [1,5-a]pyridin-2-yl)-2H-chromen-2-one (0.66 g, 95%) as a 45 yellow solid. MS m/z 281.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.83 (1H, s), 8.71 (1H, dd J=6.9 Hz, 1.0 Hz), 8.03 (1H, dd, J=8.7 Hz, 6.4 Hz), 7.78 (1H, d, J=8.8 Hz), 7.48 (1H, dd, J=9.6 Hz, 2.4 Hz), 7.34-7.24 (1H, m), 7.30 (1H, s), 7.26 (1H, m), 6.98 (1H, td, J=6.9 Hz, 1.4 Hz).

Step D: A mixture of 7-fluoro-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one (56 mg, 0.2 mmol), piperazine (52 mg, 0.6 mmol) and N,N-diisopropylethylamine (52 μL, 0.3 mmol) in DMSO (0.5 mL) was heated at 120° C. for 7 h. Upon cooling to room temperature, a precipitate formed. The precipitate was collected by vacuum filtration, washed with CH₃CN and dried to give the title compound (60 mg, 87%) as a yellow solid: m.p. 236-238° C.; MS m/z 347.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.67 (1H, dd, J=7.0 Hz, 2.3 Hz), 8.5 (1H, s), 7.73 (1H, d, J=8.9 Hz), 7.69 (1H, d, J=8.9 Hz), 7.25-7.20 (2H, m), 7.01 (1H, dd, J=8.9 Hz, 2.4 Hz), 6.92 (1H, td, J=6.8 Hz, 1.4 Hz), 6.86 (1H, d, J=2.3 Hz), 3.32 (4H, m), 2.82 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 30 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 31 Preparation of Cpd 112

Step A: A mixture of 5-chloropyridin-2-amine (2.57 g, 20 mmol) and ethyl 4-chloro-3-oxobutanoate (3.95 g, 24 mmol) in EtOH (20 mL) was heated at 90° C. for 15 h, then the solvent was removed. The residue was suspended in CH₃CN, collected by vacuum filtration, washed with CH₃CN and dried to give ethyl 2-(6-chloroimidazo[1,2-a]pyridin-2-yl)acetate (4.14 g, 86%) as a white solid. MS m/z 239.1 [M+H]⁺.

Step B: To a solution of ethyl 2-(6-chloroimidazo[1,2-a]pyridin-2-yl)acetate (2.38 g, 10 mmol) in THF was added aqueous NaOH (3 N, 6.6 mL, 20 mmol). After stirring at room temperature for 3 h, the mixture was concentrated. The residual mixture was acidified with aqueous HCl (6 N) to pH 3. A precipitate formed. The precipitate was collected by vacuum filtration, washed with water and dried, yielding 2-(6-chloroimidazo[1,2-a]pyridin-2-yl)acetic acid (1.66 g, 79%) as a white solid. MS m/z 211.1 [M+H]⁺. Step C: Following the procedure in Example 30, Step C, 2-(6-chloroimidazo[1,2-a]pyridin-2-yl)acetic acid (0.386 g, 2.5 mmol), 1-(4-fluoro-2-hydroxyphenyl)-ethanone (0.525 g, 2.5 mmol), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.623 g, 3.25 mmol), 4-(dimethylamino)pyridine (92 mg, 0.75 mmol) and triethylamine (0.91 mL, 7.5 mmol) in CH₂Cl₂ (4 mL) gave 3-(6-chloroimidazo [1,2-a]pyridin-2-yl)-7-fluoro-4-methyl-2H-chromen-2-one (0.426 g, 52%) as an off-white solid. MS m/z 329.1 [M+H]⁺.

Step D: Following the procedure in Example 30, Step D, 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-fluoro-4-methyl-2H-chromen-2-one (82 mg, 0.25 mmol), piperazine (65 mg, 0.75 mmol), DIEA (52 μL, 0.3 mmol) in DMSO (0.5 mL) gave the title compound (64 mg, 65%) as a yellow solid: m.p. 224-227° C.; MS m/z 395.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.90 (1H, d, J=2.1Hz), 8.27 (1H, s), 7.69 (1H, d, J=9.1Hz), 7.63 (1H, d, J=9.6 Hz), 7.30 (1H, dd, J=9.6 Hz, 2.1Hz), 7.01 (1H, dd, J=9.1Hz, 2.4 Hz), 6.82 (1H, d, J=2.5 Hz), 3.28 (4H, m), 2.82 (4H, m), 2.66 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 31 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 32 Preparation of Cpd 124

Step A: To a stirred solution of 7-fluorocoumarin (3.04 g, 18.5 mmol, prepared in Example 22, Step A) in chloroform (20 mL), at room temperature, was added dropwise, bromine (11.9 g, 3.81 mL, 74 mmol). After the addition, the mixture was stirred at room temperature for an additional 2 hours, then cooled in an ice-water bath and diluted with dichloromethane (100 mL). Triethylamine (22.4 g, 30.7 mL, 222 mmol) was added carefully while stirring. The mixture was stirred at room temperature for an additional 2 h after the addition. The precipitate present in the mixture was removed by filtration and washed with CH₂Cl₂ (3×15 mL). The combined filtrate was concentrated and purified by silica gel column chromatography (CH₂Cl₂), yielding 3-bromo-7-fluoro-2H-chromen-2-one (4.07 g, 90%) as white solid. MS m/z 242.4, 244.4 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.09 (1H, s), 7.47 (1H, dd, J=8.7 Hz, 5.8 Hz), 7.12-7.03 (2H, m).

Step B: A reaction tube, equipped with an open-top cap and a septum was charged with 3-bromo-7-fluoro-2H-chromen-2-one (0.49 g, 2.0 mmol), (2-(trifluoromethyl)pyridin-3-yl)boronic acid (0.42 g, 2.2 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (0.082 g, 0.1 mmol) and CH₃CN (6.0 mL). After purging three times with nitrogen, aqueous K₂CO₃ (2.0 mL, 2.0M, 4.0 mmol) was added and the mixture was stirred at 50° C. overnight, then the solvent was removed. The residue was suspended in CH₂Cl₂ and filtered. The filtrate was concentrated and purified by silica gel column chromatography (0-30% EtOAc in CH₂Cl₂) to give 7-fluoro-3-(2-(trifluoromethyl)pyridin-3-yl)-2H-chromen-2-one (0.21 g, 34%). MS m/z 310.2 [M+H]⁺.

Step C: A mixture of 7-fluoro-3-(2-(trifluoromethyl)pyridin-3-yl)-2H-chromen-2-one (93 mg, 0.3 mmol) and piperazine (52 mg, 0.6 mmol) in DMSO (0.6 mL) was stirred at 80° C. for 24 h. After cooling to room temperature, the mixture was diluted with water (5 mL) to produce a precipitate. The solid was collected by filtration, washed with water and ethyl ether, and dried to give the title compound (100 mg, 89%) as yellow powder: m.p. 197-200° C.; MS m/z 376.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.71 (1H, s), 8.53 (1H, d, J=2.5 Hz), 8.14 (1H, t, J=7.9 Hz), 7.83 (1H, d, J=8.5 Hz), 7.75 (1H, d, J=9.1Hz), 7.02 (1H, dd, J=9.0 Hz, 2.4 Hz), 6.85 (1H, d, J=2.2 Hz), 3.40-3.33 (4H, m), 2.85-2.78 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 32 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 33 Preparation of Cpd 218

Step A: A mixture of 3-bromo-7-fluorocoumarin (122 mg, 0.5 mmol, prepared in Example 32, Step A), 2-methoxy-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (235 mg, 1.0 mmol), copper(I) chloride (50 mg, 0.5 mmol), Cs₂CO₃ (652 mg, 2.0 mmol), palladium(II) acetate (5.6 mg, 0.025 mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (41 mg, 0.1 mmol) and DMF (2.0 mL) were stirred under an Argon atmosphere at 60° C. for 2 h. After cooling to room temperature, the mixture was diluted with water (10 mL) to produce a precipitate. The solid was washed with water, dried, and purified with silica gel column chromatography (0-10% EtOAc in CH₂Cl₂) to give 7-fluoro-3-(6-methoxypyridin-2-yl)-2H-chromen-2-one (52 mg, 38%). MS m/z 272.2 [M+H]⁺.

Step B: A mixture of 7-fluoro-3-(6-methoxypyridin-2-yl)-2H-chromen-2-one (52 mg, 0.19 mmol), piperazine (50 mg, 0.57 mmol) and DMSO was stirred at 80° C. overnight. After cooling to room temperature, the mixture was diluted with water (5 mL) to produce a precipitate. The precipitate was collected by filtration, dried and purified by silica gel column chromatography (0-20% MeOH in CH₂Cl₂) to give the title compound (20 mg, 31%) as yellow powder: m.p. 162-165° C.; MS m/z 338.2 [M+H]⁺. ¹H NMR (500 MHz, DMSO-d₆): δ 8.83 (1H, s), 7.96 (1H, dd, J=7.6 Hz, 0.9 Hz), 7.75 (1H, dd, J=8.2, 7.6 Hz), 7.69 (1H, d, J=8.8 Hz), 7.02 (1H, dd, J=9.0, 2.4 Hz), 6.85 (1H, d, J=2.2 Hz), 6.77 (1H, dd, J=8.2 Hz, 0.6 Hz), 3.98 (3H, s), 3.35-3.28 (4H, m), 2.86-2.78 (4H, m). As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 33 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 34 Preparation of Cpd 651

Step A: A mixture of 6-bromo-2-methylimidazo[1,2-a]pyridine (0.79 g, 3.75 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (1.14 g, 4.49 mmol), [1,1′-bis (diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (0.15 g, 0.19 mmol), potassium acetate (1.1 g, 11.5 mmol) in 1,4-dioxane (7.5 mL) was stirred at 80° C. overnight under Argon. The mixture was diluted with THF (20 mL) and filtered. The filtrate was evaporated to give a dark solid residue, which was used without further purification (MS m/z 177.0 [M+H]⁺). The residue was combined with 3-bromo-7-fluoro-2H-chromen-2-one (0.73 g, 3.0 mmol, prepared in Example 32, Step A), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium (II) complex with dichloromethane (0.245 g, 0.3 mmol) and aqueous K₂CO₃ (2.0 Mx4.5 mL, 9.0 mmol) in CH₃CN (9.0 mL). The mixture was stirred at 60° C. overnight under Argon, then diluted with water and filtered. The solid was dissolved in CH₂Cl₂ (10% methanol), dried over Na₂SO₄, filtered, concentrated and purified with by silica gel chromatography (0-10% MeOH in CH₂Cl₂) to give 7-fluoro-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one (0.67 g, 76%). MS m/z 295.0 [M+H]⁺.

Step B: A mixture of 7-fluoro-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one (90 mg, 0.31 mmol), (5)-octahydropyrrolo[1,2-a]pyrazine (50 mg, 0.40 mmol), K₂CO₃ (125 mg, 0.92 mmol) in DMSO (0.6 mL) was stirred at 100° C. overnight. The mixture was diluted with an aqueous saturated NaHCO₃ solution and filtered. The solid was dried and purified by silica gel chromatography (0-10% MeOH in CH₂Cl₂) to give the title compound (56 mg, 46%) as a yellow solid: m.p. 231-233° C.; MS m/z 401.5 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.86 (1H, dd, J=1.7, 0.8 Hz), 7.83 (1H, s), 7.49-7.57 (1H, m), 7.35-7.44 (3H, m), 6.87 (1H, d, J=8.8 Hz), 6.77 (1H, d, J=2.2 Hz), 3.94 (1H, dd, J=12.0, 1.6 Hz), 3.80 (1H, d, J=12.6 Hz), 3.24-3.06 (3H, m), 2.76 (1H, t, J=11.0 Hz), 2.47 (3H, d, J=0.6 Hz), 2.45-2.35 (1H, m), 2.30-2.10 (2H, m), 1.99-1.87 (2H, m), 1.86-1.77 (1H, m), 1.61-1.48 (1H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 34 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 35 Preparation of Cpd 769

Step A: Following the procedure in Example 34, Step A, 6-bromo-2-methylbenzo[d]thiazole (0.47 g, 2.1 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (0.63 g, 2.5 mmol), [1, 1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (84 mg, 0.1 mmol) in dioxane (4.0 mL) followed by reaction of the intermediate formed with 3-bromo-7-fluoro-2H-chromen-2-one (0.45 g, 1.85 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (0.16 g, 0.2 mmol), aqueous K₂CO₃ (2.0 Mx3.0 mL, 6.0 mmol) in CH₃CN (6.0 mL) yielded 7-fluoro-3-(2-methylbenzo[d]thiazol-6-yl)-2H-chromen-2-one (144 mg, 25%). MS m/z 312.0 [M+H]⁺.

Step B: A mixture of 7-fluoro-3-(2-methylbenzo[d]thiazol-6-yl)-2H-chromen-2-one (34 mg, 0.11 mmol), 1-methylpiperazine (22 mg, 0.22 mmol), triethylamine (49 mg, 0.49 mmol) in DMSO (0.25 mL) was stirred at 110° C. overnight. The mixture was diluted with an aqueous saturated NaHCO₃ solution and filtered. The solid was dried and purified by silica gel chromatography (0-10% MeOH in CH₂Cl₂) to give the title compound (41 mg, 95%) as a yellow solid: m.p. 215-217° C.; MS m/z 392.4 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.28 (1H, d, J=1.8 Hz), 7.98 (1H, dd, J=8.5, 0.6 Hz), 7.80 (1H, s), 7.73 (1H, dd, J=8.5, 1.6 Hz), 7.40 (1H, d, J=8.8 Hz), 6.86 (1H, dd, J=8.8, 2.5 Hz), 6.78 (1H, d, J=2.2 Hz), 3.42 (4H, br. s.), 2.86 (3H, s), 2.62 (4H, s), 2.40 (3H, s)

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 35 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 36 Preparation of Cpd 421 Part 1: Preparation of 3-fluoro-5-methylpyridin-2-amine

Step A: A solution of 3-fluoropyridin-2-amine (1.0 g, 8.92 mmol) was dissolved in CH₃CN (300 mL) at 0° C. N-Bromosuccinimide (800 mg, 4.5 mmol) was added to the solution. The reaction mixture was stirred at 0° C. for 20 min, then at room temperature for 20 min. The mixture was cooled to 0° C. Additional N-bromosuccinimide (800 mg, 4.5 mmol) was added. The mixture warmed to room temperature over 40 minutes. An aqueous NaHSO₃ solution was added to the mixture to quench excess reagent, then the solvent was removed under vacuum. The residue was dissolved in EtOAc, then washed with aqueous K₂CO₃. The organic layer was dried over MgSO₄, then filtered and concentrated under vacuum. Trituration of the residue with 2:1 hexanes:ether yielded 5-bromo-3-fluoropyridin-2-amine (1.18 g, 69%) as a white solid. ¹H NMR (500 MHz, CDCl₃): δ 7.93 (1H, d, J=2 Hz), 7.37 (1H, dd, J=9.5 Hz, 2 Hz), 4.66 (2H, br s), 2.77 (3H, s).

Step B: A solution of dimethylzinc (15 mL, 1.2 M in toluene, 18 mmol) was added to a mixture of 5-bromo-3-fluoropyridin-2-amine (1.48 g, 7.75 mmol) and [1,1′-bis (diphenylphosphino)-ferrocene]dichloropalladium(II) complex with dichloromethane (150 mg, 0.18 mmol) in 1,4-dioxane (30 mL). The mixture was heated at 95° C. for 2 h. The reaction mixture was cooled to room temperature and quenched with MeOH. The mixture was diluted with aqueous saturated NH₄OH and extracted with EtOAc. The organic layer was dried over MgSO₄, filtered and concentrated under vacuum. The residue was purified by silica gel column chromatography (20% acetone in CH₂Cl₂), followed by trituration with hexane to give 3-fluoro-5-methylpyridin-2-amine (668 mg, 68%) as a tan solid. ¹H NMR (500 MHz, CDCl₃): δ 7.69 (1H, s), 7.06 (1H, dd, J=11.5 Hz, 1.5 Hz), 4.43 (2H, br s), 2.21 (3H, s).

Part 2: Preparation of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one

Step A: Into a mixture of 4-fluoro-2-hydroxybenzaldehyde (1.4 g, 10 mmol) and ethyl 3-oxobutanoate (1.3 g, 10 mmol) was added a few drops of piperidine. The mixture was stirred at room temperature for 10 min. A precipitate formed and was collected by vacuum filtration. The solid was washed with ethanol and aqueous HCl (1 N), filtered and dried to give 3-acetyl-7-fluoro-2H-chromen-2-one (1.96 g, 95%) as a pale yellow solid. ¹H NMR (500 MHz, CDCl₃): 8 8.51 (1H, s), 7.68 (1H, m), 7.13-7.07 (2H, m), 2.73 (3H, s).

Step B: Into a solution of 3-acetyl-7-fluoro-2H-chromen-2-one (1.96 g, 9.5 mmol) in CHCl₃ (20 mL) was added dropwise a solution of bromine (1.6 g, 10 mmol) in CHCl₃ (10 mL). The mixture was stirred at room temperature for 1 h and filtered. The solid was washed with CHCl₃ and dried to give the title compound (1.96 g, 72%) as a pale yellow solid. ¹H NMR (500 MHz, CDCl₃): δ 8.63 (1H, s), 7.72 (1H, m), 7.17-7.10 (2H, m), 4.73 (2H, s).

Part 3: Preparation of Cpd 421

Step A: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (500 mg, 1.75 mmol), 3-fluoro-5-methylpyridin-2-amine (240 mg, 1.9 mmol) and EtOH (3 mL) was heated at 95° C. for 18 h. The reaction mixture was partitioned between CH₂Cl₂ and aqueous K₂CO₃. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was triturated with 1:1 hexane/acetone, yielding 7-fluoro-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (412 mg, 75%) as an orange solid. ¹H NMR (500 MHz, CDCl₃): δ 8.85 (1H, s), 8.50 (1H, d, J=2.5 Hz), 7.77 (1H, m), 7.63 (1H, dd, J=9 Hz, 6 Hz), 7.11 (1H, dd, J=9 Hz, 2 Hz), 7.07 (1H, td, J=8.5 Hz, 2.5 Hz), 6.80 (1H, d, J=6 Hz), 2.34 (3H, s).

Step B: A mixture of 7-fluoro-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (120 mg, 0.38 mmol), (S)-2-methylpiperazine (75 mg, 0.75 mmol) and DMSO (900 μL) was heated at 80° C. for 15 h. The mixture was diluted with an aqueous saturated NaHCO₃ solution, causing the product to precipitate from solution. The mixture was filtered. The solid material was purified by silica gel column chromatography (10% MeOH in CH₂Cl₂), yielding the title compound (133 mg, 89%) as a yellow solid: m.p. 250-255° C.; MS m/z 393.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.73 (1H, s), 8.52 (1H, d, J=3 Hz), 8.31 (1H, s), 7.72 (1H, d, J=8.5 Hz), 7.09 (1H, d, J=12 Hz), 7.02 (1H, dd, J=9 Hz, 2 Hz), 6.88 (1H, d, J=2 Hz), 3.81 (2H, m), 2.96 (1H, m), 2.73 (3H, m), 2.39 (1H, t, J=11Hz), 2.31 (1H, br s), 2.28 (3H, s), 1.04 (3H, d, J=6 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 36 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 37 Preparation of Cpd 520

Step A: A mixture of 4-bromo-2-hydroxybenzaldehyde (5.0 g, 24.8 mmol), piperidine (150 μL, 1.5 mmol), ethyl acetoacetate (3.15 mL, 25 mmol) and CH₃CN (2.0 mL) was heated at 80° C. for 1 h. The reaction mixture was partitioned between CH₂Cl₂ and aqueous HCl (1 M). The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was triturated with MeOH, yielding 3-acetyl-7-bromo-2H-chromen-2-one (5.45 g, 82%) as a yellow solid. ¹H NMR (500 MHz, CDCl₃): δ 8.46 (1H, s), 7.56 (1H, d, J=1.5 Hz), 7.51 (1H, d, J=8 Hz), 7.48 (1H, dd, J=8 Hz, 1.5 Hz), 2.72 (3H, s).

Step B: A solution of Br₂ (1.1 mL, 21.4 mmol) in CHCl₃ (25 mL) was added dropwise to a solution of 3-acetyl-7-bromo-2H-chromen-2-one (5.4 g, 20.2 mmol) in CHCl₃ (90 mL) over a period of 90 min. The mixture was filtered. The solid material was washed with CHCl₃, yielding 7-bromo-3-(2-bromoacetyl)-2H-chromen-2-one (5.6 g, 80%) as a light pink solid. ¹H NMR (500 MHz, CDCl₃): δ 8.58 (1H, s), 7.60 (1H, d, J=1.5 Hz), 7.55 (1H, d, J=8.5 Hz), 7.52 (1H, dd, J=8.5 Hz, 1.5 Hz), 4.72 (2H, s).

Step C: A mixture of 7-bromo-3-(2-bromoacetyl)-2H-chromen-2-one (100 mg, 0.29 mmol), 3,5-difluoropyridin-2-amine (48 mg, 0.37 mmol) and CHCl₃ (500 μL) was heated at 80° C. for 25 h. The reaction mixture was partitioned between CH₂Cl₂ and an aqueous saturated NaHCO₃ solution. The organic layer was dried over MgSO₄, filtered, and concentrated under vacuum. The residue was purified by silica gel column chromatography (CH₂Cl₂), yielding 7-bromo-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (96 mg, 88%) as a white solid. ¹H NMR (500 MHz, CDCl₃): δ 8.88 (1H, s), 8.64 (1H, d, J=3 Hz), 8.00 (1H, m), 7.59 (1H, d, J=1.5 Hz), 7.53 (1H, d, J=8.5 Hz), 7.47 (1H, dd, J=8.5 Hz, 1.5 Hz), 6.99 (1H, m).

Step D: A mixture of 7-bromo-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (40 mg, 0.11 mmol), (2-biphenyl)-di-t-butylphosphine (6 mg, 0.02 mmol), Pd₂(dba)₃ (6 mg, 0.0066 mmol), Cs₂CO₃ (55 mg, 0.17 mmol), 1-methylhomopiperazine (24 μL, 0.18 mmol), and 1,2-dimethoxyethane (450 μL) was heated at 80° C. for 90 min. The reaction mixture was then diluted in CH₂Cl₂ and filtered. The filtrate was concentrated. The residue was purified by silica gel column chromatography (5-10% MeOH in CH₂Cl₂), followed by trituration with 3:1 hexane/CH₂Cl₂, yielding the title compound (24 mg, 53%) as a yellow solid: m.p. 255-260° C.; MS m/z 411.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.79 (1H, m), 8.73 (1H, s), 8.63 (1H, d, J=3 Hz), 7.70 (1H, d, J=9 Hz), 7.55 (1H, m), 6.84 (1H, dd, J=9 Hz, 2.5 Hz), 6.67 (1H, d, J=2 Hz), 3.65 (2H, t, J=5 Hz), 3.57 (2H, t, J=5.5 Hz), 2.64 (2H, t, J=5 Hz), 2.46 (2H, t, J=5.5 Hz), 2.27 (3H, s), 1.92 (2H, pentet, J=5.5 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 37 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 38 Preparation of Cpd 89

Step A: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (0.285 g, 1.0 mmol, prepared in Example 36, Part 2) and 2-aminopyrimidine (0.19 g, 2.0 mmol) in EtOH (2.0 mL) was stirred at 95° C. overnight. The mixture was diluted with water and filtered. The solid was washed with water and dried to afford 7-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one hydrobromide (0.28 g, 78%) as a pale yellow solid. MS m/z 282.1 [M₊H]⁺.

Step B: A mixture of 7-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one hydrobromide (50 mg, 0.18 mmol) and piperazine (61 mg, 0.71 mmol) in DMSO (0.5 mL) was stirred at 110° C. for 2 h. The mixture was diluted with an aqueous saturated NaHCO₃ solution and filtered. The solid was washed with water and dried to afford the title compound (40 mg, 64%) as a yellow solid: m.p. 286° C. (decomp.); MS m/z 348.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.78 (1H, dd, J=6.8 Hz, 2.2 Hz), 8.55 (1H, s), 8.46 (1H, dd, J=4.2 Hz, 2.2 Hz), 8.40 (1H, s), 7.52 (1H, d, J=8.8 Hz), 6.95-6.91 (2H, m), 6.76 (1H, d, J=2.2 Hz), 3.33-3.28 (4H, m), 2.91-2.86 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 38 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 39 Preparation of Cpd 241

Part 1: Preparation of 5-methylpyrimidin-2-amine

Step A: A mixture of 2-amino-5-bromopyrimidine (2.75 g, 15.8 mmol) and di-tert-butyl dicarbonate (7.58 g, 34.8 mmol) in pyridine (30 mL) was stirred at 70° C. overnight, then the solvent was removed. The residue was partitioned between EtOAc and aqueous HCl (1 N). The aqueous layer was extracted with EtOAc. The combined organics were dried over NaSO₄, then filtered and concentrated to give 2-[bis(tert-butoxycarbonyl)amino]-5-bromopyrimidine (5.5 g, 93%) as a white solid. MS m/z 398.2 [M+Na]⁺.

Step B: A mixture of 2-[bis(tert-butoxycarbonyl)amino]-5-bromopyrimidine (3.0 g, 8.0 mmol), dimethylzinc (1.2 M×8.0 mL, 9.6 mmol) and [1,1′-bis(diphenylphosphino) ferrocene]dichloropalladium(II) (130 mg, 0.16 mmol) in 1,4-dioxane (30 mL) was stirred at 110° C. for 16 h under Argon. The mixture was cooled to room temperature, diluted with ethyl acetate and washed with saturated NH₄Cl, water and brine. The organic layer was dried over NaSO₄, concentrated and purified by silica gel column chromatography (0-35% EtOAc in hexanes) to give a white solid, which was dissolved in trifluoroacetic acid (5.0 mL). After 5 min, the solvent was removed and the residue was partitioned between ethyl acetate and an aqueous saturated NaHCO₃ solution. The organic layer was dried over NaSO₄, filtered and concentrated to give the title compound (0.7 g, 80%) as a white solid. MS m/z 110.1 [M+H]⁺.

Part 2: Preparation of Cpd 241

Step A: Following the procedure in Example 36, Part 3, 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (0.855 g, 3.0 mmol) and 5-methylpyrimidin-2-amine (0.327 g, 3.0 mmol) in EtOH (6.0 mL) gave 7-fluoro-3-(6-methylimidazo [1,2-a]pyrimidin-2-yl)-2H-chromen-2-one hydrobromide (0.37 g, 42%) as a pale yellow solid. MS m/z 296.2 [M+H]⁺.

Step B: Following the procedure in Example 36, Part 3, 7-fluoro-3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one hydrobromide (80 mg, 0.21 mmol) and N-methyl piperizine (93 mg, 1.08 mmol) in DMSO (0.5 mL) gave the title compound (66 mg, 84%) as a yellow solid: m.p.>300° C.; MS m/z 362.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.83 (1H, dd, J=2.4 Hz, 1.1Hz), 8.75 (1H, s), 8.44 (1H, d, J=2.2 Hz), 8.39 (1H, s), 7.71 (1H, d, J=8.8 Hz), 7.02 (1H, dd, J=8.8 Hz, 2.2 Hz), 6.86 (1H, d, J=2.2 Hz), 3.32-3.28 (4H, m), 2.86-2.75 (4H, m), 2.30 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 39 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 40 Preparation of Cpd 480 Part 1: Preparation of 5-fluoropyrimidin-2-amine

2-Chloro-5-fluoropyrimidine (1.34 g, 10 mmol) was stirred with ammonium hydroxide (30%, 15 mL) at 100° C. in a sealed tube overnight. The mixture was cooled to room temperature and filtered. The solid was washed with water and dried to give the title compound (0.95 g, 80%) as a white solid.

Part 2: Preparation of Cpd 480

Step A: Following the procedure in Example 36, Part 3, 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (1.32 g, 4.1 mmol) and 5-fluoropyrimidin-2-amine (0.465 g, 4.1 mmol) in EtOH (12.0 mL) gave 7-fluoro-3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one (0.85 g, 70%) as a pale yellow solid. MS m/z 300.1 [M+H]⁺.

Step B: Following the procedure in Example 36, Part 3, 7-fluoro-3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one (70 mg, 0.23 mmol) and N-methyl piperizine (46 mg, 0.46 mmol) in DMSO (0.5 mL) gave the title compound (55 mg, 63%) as a yellow solid: m.p. 275-280° C.; MS m/z 380.8 [M+H]⁺; ¹H NMR (500 MHz, methanol-d₄): δ 8.95 (1H, dd, J=3.8 Hz, 2.8 Hz), 8.65 (1H, s), 8.61 (1H, d, J=2.8 Hz), 8.53 (1H, s), 7.62 (1H, d, J=8.8 Hz), 7.02 (1H, dd, J=8.7 Hz, 2.4 Hz), 6.86 (1H, d, J=2.2 Hz), 3.51 (4H, br s), 2.81 (4H, br s), 2.50 (3H, br s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 40 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 41 Preparation of Cpd 117

Step A: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (2.85 g, 10 mmol, prepared in Example 36, Part 2) and 2-aminothiazole (1.0 g, 10 mmol) in EtOH (20 mL) was stirred at 95° C. for 6 h. After cooling to room temperature, ethyl acetate was added, causing a precipitate to form. The mixture was filtered. The solid was washed with ethyl acetate and dried, affording 6-(7-fluoro-2-oxo-2H-chromen-3-yl)imidazo[2,1-b]thiazole hydrobromide salt (1.82 g, 64%) as a tan solid. MS m/z 287.1 [M+H]⁺.

Step B: A mixture of 6-(7-fluoro-2-oxo-2H-chromen-3-yl)imidazo[2,1-b]thiazole hydrobromide salt (286 mg, 1.0 mmol) and 1-methylpiperazine (1.0 mL, 3.0 mmol) in DMSO (1.5 mL) was stirred at 110° C. for 2 h. The mixture was cooled to room temperature and diluted with water, producing a precipitate. The precipitate was collected by vacuum filtration, washed with water, dried and purified by silica gel column chromatography (0-10% MeOH in CH₂Cl₂) to give the title compound (185 mg, 51%) as a yellow solid: m.p. 256-258° C.; MS m/z 367.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.53 (1H, s), 8.31 (1H, s), 7.94 (1H, d, J=4.4 Hz), 7.64 (1H, d, J=8.8 Hz), 7.26 (1H, d, J=4.4 Hz), 7.02 (1H, dd, J=8.8 Hz, 2.5 Hz), 6.87 (1H, d, J=2.2 Hz), 3.45-3.23 (4H, m), 2.47-2.39 (4H, m), 2.22 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 41 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 42 Preparation of Cpd 429 Preparation of 5-ethylthiazol-2-amine

Into a mixture of butyraldehyde (10.8 g, 0.15 mol) and urea (22.8 g, 0.3 mol) in CHCl₃ (75 mL) at 0° C. was added sulfuryl chloride (13.5 mL, 0.166 mol) dropwise. The mixture was warmed to room temperature and stirred for 1 h, then the solvent was removed. EtOH (200 mL) was added to the residue, then the mixture was heated at reflux overnight and the solvent was removed. The residue was suspended in water (200 mL) and collected by vacuum filtration to give the title compound (9.5 g, 40%) as a light brown solid. MS m/z 129.1 [M+H]⁺.

Part 2: Preparation of Cpd 429

Step A: Following the procedure in Example 41, Step A, 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (0.76 g, 2.7 mmol) and 5-ethylthiazol-2-amine (0.35 g, 2.7 mmol) in EtOH (20 mL) gave 3-(2-ethylimidazo[2,1-b]thiazol-6-yl)-7-fluoro-2H-chromen-2-one hydrobromide (0.55 g, 66%) as a tan solid. MS m/z 315.2 [M+H]⁺.

Step B: Following the procedure in Example 41, Step B, 3-(2-ethylimidazo[2,1-b]thiazol-6-yl)-7-fluoro-2H-chromen-2-one hydrobromide (42 mg, 0.13 mmol) and 2,6-cis-dimethylpiperizine (30 mg, 0.26 mmol) in DMSO (0.25 mL) gave the title compound (3.8 mg, 7%) as a yellow solid: m.p. 251-253° C.; MS m/z 409.4 [M+H]⁺; ¹H NMR (500 MHz, methanol-d₄) δ 8.32 (1H, s), 8.21 (1H, s), 7.56-7.48 (2H, m), 7.00 (1H, dd, J=9.0 Hz, 2.4 Hz), 6.82 (1H, d, J=2.2 Hz), 3.82 (2H, dd, J=12.5 Hz, 2.4 Hz), 3.00-2.89 (2H, m), 2.82 (2H, qd, J=7.5, 1.4 Hz), 2.43 (2H, dd, J=12.5 Hz, 10.9 Hz), 1.34 (3H, t, J=7.4 Hz), 1.18 (6H, d, J=6.6 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 42 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 43 Preparation of Cpd 536

Step A: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (0.684 g, 2.4 mmol, prepared in Example 36, Part 2) and 3,5-dimethylpyrazin-2-amine (0.246 g, 2.0 mmol) in CH₃CN (10 mL) was stirred at 120° C. in a sealed tube for 20 min. The mixture was cooled to room temperature and diluted with Et₂O to produce a precipitate. The solid was collected by vacuum filtration, washed with Et₂O and dried to give 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-fluoro-2H-chromen-2-one hydrobromide (0.7 g, 90%) as a tan solid. MS m/z 310.1 [M+H]⁺.

Step B: 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-fluoro-2H-chromen-2-one hydrobromide (100 mg, 0.25 mmol) was stirred with (R)-2-methylpiperazine (52 mg, 0.52 mmol) in DMSO (0.5 mL) with K₂CO₃ (0.14 g, 1.0 mmol) at 120° C. for 2 h. The mixture was cooled to room temperature and diluted with water to produce a precipitate. The solid was collected by vacuum filtration and purified by silica gel chromatography (10% MeOH in CH₂Cl₂) to give the title compound (64 mg, 64%) as a yellow solid. MS m/z 390.2 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.74 (1H, s), 8.45 (1H, s), 7.77 (1H, s), 7.51 (1H, d, J=8.8 Hz), 6.88 (1H, dd, J=8.8 Hz, 2.5 Hz), 6.77 (1H, d, J=2.5 Hz), 3.77-3.67 (2H, m), 3.21-3.14 (2H, m), 3.06-2.92 (3H, m), 2.91 (3H, s), 2.64-2.56 (1H, m), 2.48 (3H, s), 1.20 (3H, d, J=6.3 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 43 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 44 Preparation of Cpd 607 Part 1: Preparation of 5-methyl-3-(trifluoromethyl)pyrazin-2-amine

Into a solution of 5-methylpyrazin-2-amine (0.51 g, 4.72 mmol) and ferrocene (0.263 g, 1.42 mmol) in DMSO (12 mL) was added sulfuric acid (12 mL) and a solution of CF₃I in DMSO (2.4 M, 5.9 mL, 14.2 mmol). Aqueous hydrogen peroxide (30%, 0.94 mL) was added dropwise to the mixture. After stirring for 30 min at room temperature, excess reagent was quenched with ice water. The mixture was diluted with water and extracted with EtOAc. The organic layer was dried over NaSO₄, filtered, concentrated and purified by silica gel column chromatography (0-20% EtOAc in CH₂Cl₂) to give the title compound (86 mg, 8%) as a white solid. MS m/z 219.1 [M+H]⁺.

Part 2: Preparation of Cpd 607

Step A: Following the procedure in Example 43, Step A, 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (138 g, 0.49 55 mmol) and 5-methyl-3-(trifluoromethyl)pyrazin-2-amine (86 g, 0.49 mmol) in CH₃CN (1.0 mL) gave 7-fluoro-3-(6-methyl-8-(trifluoromethyl)imidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one hydrobromide (44 mg, 20%) as a tan solid. Step B: Following the procedure in Example 43, Step B, 7-fluoro-3-(6-methyl-8-(trifluoromethyl)imidazo [1,2-a]pyrazin-2-yl)-2H-chromen-2-one hydrobromide (44 mg, 0.10 mmol) and 1,4-diazepane (44 mg, 0.44 mmol) in DMSO (0.25 mL) gave the title compound (43 mg, 99%) as a yellow solid: m.p.>300° C.; MS m/z 444.2 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.79 (1H, s), 8.59 (1H, s), 8.09 (1H, s), 7.50 (1H, d, J=9.1Hz), 6.69 (1H, dd, J=8.8 Hz, 2.2 Hz), 6.57 (1H, d, J=1.9 Hz), 3.70-3.61 (4H, m), 3.10-3.01 (2H, m), 2.88-2.83 (2H, m), 2.55 (3H, s), 2.03-1.90 (2H, m).

Example 45 Preparation of Cpd 712 Part 1: Preparation of 5-chloro-3-methylpyrazin-2-amine

A mixture of 3-methylpyrazin-2-amine (109 mg, 1.0 mmol) and N-chlorosuccinimide (136 mg, 1.0 mmol) in CH₂Cl₂ (6.0 mL) was stirred at room temperature overnight. The mixture was washed with aqueous K₂CO₃ (2.0 M, 6.0 mL). The organic layer was dried over NaSO₄, filtered, concentrated and purified by silica gel column chromatography (0-35% EtOAc in hexanes) to give the title compound (136 mg, 80%) as a white solid. MS m/z 144.0 [M+H]⁺.

Part 2: Preparation of Cpd 712

Step A: Following the procedure in Example 43, Step A, 60 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (0.233 g, 0.81 mmol) and 5-chloro-3-methylpyrazin-2-amine (0.117 g, 0.81 mmol) in CH₃CN (3.0 mL) gave 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-fluoro-2H-chromen-2-one hydrobromide (0.18 g, 67%) as a tan solid. MS m/z 330.1 [M+H]⁺.

Step B: Following the procedure in Example 43, Step B, 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-fluoro-2H-chromen-2-one hydrobromide (67 mg, 0.2 mmol), N-methyl homopiperizine (28 mg, 0.24 mmol) and triethylamine (100 mg, 1.0 mmol) in DMSO (0.5 mL) gave the title compound (70 mg, 83%) as a yellow solid: m.p. 212-218° C.; MS m/z 424 [M+H]⁺; ¹H NMR (500 MHz, methanol-d₄) δ 8.71 (1H, s), 8.55 (1H, s), 8.42 (1H, d, J=0.9 Hz), 7.56 (1H, d, J=8.8 Hz), 6.84 (1H, dd, J=8.8 Hz, 2.5 Hz), 6.67 (1H, d, J=2.2 Hz), 3.86-3.77 (2H, m), 3.65 (2H, t, J=6.3 Hz), 3.16 (2H, d, J=1.6 Hz), 3.04 (2H, br s), 2.89-2.82 (3H, m), 2.69 (3H, s), 2.27-2.14 (2H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 45 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 46 Preparation of Cpd 398

Step A: A mixture of 3-chloropyrazin-2-amine (1.29 g, 10 mmol) and sodium methanethiolate (1.05 g, 15 mmol) in DMF (10 mL) and EtOH (10 mL) was stirred at 85° C. for 2 h, and then concentrated. The mixture was diluted with water and filtered. The filtrate was extracted with ethyl acetate. The organic layer was washed with water, dried over Na₂SO₄, filtered and concentrated. The residue was combined with the material collected from filtration, affording the desired product 3-(methylthio)pyrazin-2-amine (1.33 g, 94%) as a white solid. MS m/z 142.1 [M+H]⁺.

Step B: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (2.85 g, 10 mmol, prepared in Example 36, Part 2) and 3-(methylthio)pyrazin-2-amine (1.5 g, 10 mmol) in CH₃CN (40 mL) was stirred at 110° C. overnight. The mixture was cooled to room temperature and diluted with ethyl acetate to generate a precipitate. The solid was collected by vacuum filtration, washed with ethyl acetate and dried, yielding 7-fluoro-3-(8-(methylthio)imidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one hydrobromide salt (2.15 g, 66%) as a tan solid. MS m/z 328.1 [M+H]⁺.

Step C: A mixture of 7-fluoro-3-(8-(methylthio)imidazo [1,2-a]pyrazin-2-yl)-2H-chromen-2-one hydrobromide (100 mg, 0.24 mmol) and piperazine (60 mg, 0.6 mmol) in DMSO (0.5 mL) was stirred at 120° C. for 5 h. The mixture was cooled to room temperature and diluted with water to produce a precipitate. The solid was collected by vacuum filtration, washed with water, dried and purified with silica gel column chromatography (5-10% MeOH in CH₂Cl₂) to give the title compound (52 mg, 55%) as a yellow solid. MS m/z 394.3 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.81 (1H, s), 8.50 (1H, s), 7.81 (1H, d, J=4.4 Hz), 7.70 (1H, d, J=4.7 Hz), 7.52 (1H, d, J=8.8 Hz), 6.88 (1H, dd, J=8.8 Hz, 2.5 Hz), 6.77 (1H, d, J=2.2 Hz), 3.50 (1H, s), 3.38-3.30 (4H, m), 3.09-3.01 (4H, m), 2.71 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 46 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 47 Preparation of Cpd 456

Into a solution of 7-(4-methylpiperazin-1-yl)-3-(7-(methylthio)imidazo[1,2-c]pyrimidin-2-yl)-2H-chromen-2-one (30 mg, 0.076 mmol) in dimethylacetamide (2.0 mL) at 88° C. was added a large excess of Raney Nickle. The mixture was stirred until gas evolution ceased (−10 min). The mixture was diluted with MeOH and filtered through Celite. The filtrate was concentrated under a stream of nitrogen. The residue was purified with silica gel column chromatography (5-10% MeOH in CH₂Cl₂) to give the title compound (32 mg, 55%) as a yellow solid: m.p. 258-260° C.; MS m/z 348.2 [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 9.07 (1H, s), 8.75 (1H, s), 8.60 (1H, d, J=0.6 Hz), 8.09 (1H, dd, J=4.6 Hz, 1.4 Hz), 7.88 (1H, d, J=4.4 Hz), 7.50 (1H, d, J=8.8 Hz), 6.88 (1H, dd, J=8.8 Hz, 2.2 Hz), 6.78 (1H, d, J=2.5 Hz), 3.36 (4H, dd, J=6.1Hz, 4.3 Hz), 3.05 (4H, dd, J=6.1Hz, 4.3 Hz)

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 47 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 48 Preparation of Cpd 563

Step A: A mixture of 7-bromo-3-(2-bromoacetyl)-2H-chromen-2-one (2.0 g, 5.78 mmol, prepared in Example 37, Step B), 2-amino-3,5-dimethylpyrazine (825 mg, 6.71 mmol) and CH₃CN (22 mL) was heated at 90° C. for 4 h. The addition of an aqueous saturated NaHCO₃ solution to the mixture resulted in the formation of a precipitate. The precipitate was collected by vacuum filtration and triturated with 1:1 hexane/acetone, yielding 7-bromo-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one (1.9 g, 88%) as an orange solid. ¹H NMR (500 MHz, DMSO-d₆): δ 8.81 (1H, s), 8.61 (1H, s), 8.31 (1H, s), 7.93 (1H, d, J=8 Hz), 7.76 (1H, d, J=1.5 Hz), 7.58 (1H, dd, J=8 Hz, 1.5 Hz), 2.76 (3H, s), 2.37 (3H, s).

Step B: A mixture of 7-bromo-3-(6,8-dimethylimidazo[1, 2-a]pyrazin-2-yl)-2H-chromen-2-one (150 mg, 0.40 mmol), (2-biphenyl)-di-t-butylphosphine (10 mg, 0.033 mmol), Pd₂ (dba)₃ (10 mg, 0.011 mmol), Cs₂CO₃ (170 mg, 0.52 mmol), (S)-1-Boc-3-aminopyrrolidine (105 μL, 0.60 mmol) and 1,2-dimethoxyethane (1.4 mL) was heated at 80° C. for 4 h. The reaction mixture was diluted with CH₂Cl₂ and filtered. The filtrate was concentrated. The residue was purified by silica gel column chromatography (30-50% acetone in CH₂Cl₂), followed by trituration with 1:1 hexane/acetone, yielding (S)-tert-butyl 3-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-ylamino)pyrrolidine-1-carboxylate (109 mg, 57%) as a yellow solid. MS m/z 476.3 [M+H]⁺.

Step C: A mixture of (S)-tert-butyl 3-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-ylamino)pyrrolidine-1-carboxylate (105 mg, 0.22 mmol) was stirred in a solution of trifluoroacetic acid (1.0 mL) in CH₂Cl₂ (4.0 mL) for 15 min. The reaction mixture was poured into dilute aqueous NaOH. The mixture was extracted with CH₂Cl₂ (EtOH added to improve the solubility). The organic layer was collected and concentrated under reduced pressure, yielding the title compound (70 mg, 85%) as a yellow solid: m.p. 132° C. (decomp.); MS m/z 376.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.70 (1H, s), 8.50 (1H, s), 8.32 (1H, s), 7.68 (1H, d, J=9 Hz), 7.06 (1H, d, J=6.5 Hz), 6.68 (1H, dd, J=9 Hz, 2 Hz), 6.55 (1H, d, J=2 Hz), 4.12 (1H, m), 3.37 (1H, dd, J=12 Hz, 6 Hz), 3.18 (1H, m), 3.11 (1H, m), 2.94 (1H, dd, J=12 Hz, 4 Hz), 2.76 (3H, s), 2.37 (3H, s), 2.22 (1H, m), 1.82 (1H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 48 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 49 Preparation of Cpd 620

Step A: A mixture of (S)-tert-butyl 3-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-ylamino)pyrrolidine-1-carboxylate (255 mg, 0.54 mmol, prepared in Example 48, Step B), NaH (60% mineral oil suspension, 32 mg, 0.80 mmol) and DMF (2.5 mL) were stirred at room temperature for 10 min. Iodomethane (34 μL, 0.54 mmol) was added to the mixture. After stirring the mixture for 10 min, additional iodomethane (17 μL, 0.27 mmol) was added. After stirring an additional 10 min, water was slowly added to the reaction mixture to quench any remaining NaH. The addition of H₂O (15 mL) to the reaction mixture caused a precipitate to form. The precipitate was collected by vacuum filtration and purified by silica gel column chromatography (20-30% acetone in CH₂Cl₂), followed by ether trituration, yielding (S)-tert-butyl 3-((3-(6, 8-dimethylimidazo [1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)(methyl)amino)pyrrolidine-1-carboxylate (84 mg, 32%) as a yellow solid. MS m/z 490.2 [M+H]⁺.

Step B: A mixture of (S)-tert-butyl 3-((3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl) (methyl)amino)pyrrolidine-1-carboxylate (80 mg, 0.16 mmol) was stirred in a solution of trifluoroacetic acid (1.0 mL) in CH₂Cl₂ (4.0 mL) for 2 h. The reaction mixture was poured into dilute aqueous NaOH. The mixture was extracted with a mixture of CH₂Cl₂ and EtOH. The organic layer was collected and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (10% 9:1 MeOH:NH₄OH in CH₂Cl₂), yielding the title compound (42 mg, 67%) as a yellow solid: m.p. 192-202° C.; MS m/z 390.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.70 (1H, s), 8.49 (1H, s), 8.31 (1H, s), 7.71 (1H, d, J=9 Hz), 6.91 (1H, dd, J=9 Hz, 2.5 Hz), 6.72 (1H, d, J=2 Hz), 4.53 (1H, m), 3.04 (1H, dd, J=11Hz, 8 Hz), 2.96 (1H, m), 2.93 (3H, s), 2.77 (2H, m), 2.75 (3H, s), 2.37 (3H, s), 2.06 (1H, m), 1.66 (1H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 49 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 50 Preparation of Cpd 740

Step A: A mixture of 7-bromo-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one (1.1 g, 2.97 mmol, prepared in Example 48, Step A), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1 (2H)-_(car)boxylate (1.12 g, 3.62 mmol), K₂CO₃ (1.24 g, 9.0 mmol), [1,1′-bis(diphenylphosphino)-ferrocene]dichloropalladium(II) complex with dichloromethane (200 mg, 0.24 mmol) and CH₃CN (8 mL) was heated at 80° C. for 4 h. The reaction mixture was partitioned between CH₂Cl₂ and H₂O. The organic layer was concentrated under vacuum. The residue was purified by silica gel column chromatography (30-50% acetone in CH₂Cl₂), followed by trituation with acetone, yielding tert-butyl 4-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate (1.17 g, 83%) as a light yellow solid. ¹H NMR (500 MHz, DMSO-d₆): δ 8.85 (1H, s), 8.62 (1H, s), 8.34 (1H, s), 7.94 (1H, d, J=8.5 Hz), 7.52 (1H, d, J=8.5 Hz), 7.50 (1H, s), 6.47 (1H, br s), 4.07 (2H, br s), 3.58 (2H, t, J=5 Hz), 2.77 (3H, s), 2.53 (2H, br s), 2.38 (3H, s), 1.45 (9H, s).

Step B: A solution of tert-butyl 4-(3-(6,8-dimethylimidazo [1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate (300 mg, 0.63 mmol) in trifluoroacetic acid (1.0 mL) and CH₂Cl₂ (4 mL) was stirred at room temperature for 30 min. The reaction mixture was poured into dilute aqueous NaOH. The mixture was extracted with CH₂Cl₂ (EtOH added to improve the solubility). The organic layer was collected and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (30% MeOH in CH₂Cl₂, followed by 10-20% 9:1 MeOH:NH₄OH in CH₂Cl₂) yielding the title compound (183 mg, 77%) as a light tan solid: m.p. 205-211° C.; MS m/z 373.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.83 (1H, s), 8.61 (1H, s), 8.33 (1H, s), 7.91 (1H, d, J=8.5 Hz), 7.50 (1H, dd, J=8 Hz, 1.5 Hz), 7.45 (1H, s), 6.52 (1H, m), 3.42 (2H, m), 2.94 (2H, t, J=6 Hz), 2.77 (3H, s), 2.40 (2H, m), 2.37 (3H, s), 2.28 (1H, br s).

Example 51 Preparation of Cpd 742

A solution of 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1,2,3,6-tetrahydropyridin-4-yl)-2H-chromen-2-one (133 mg, 0.36 mmol, prepared in Example 50) in 1,2-dichloroethane:MeOH (20 mL, 1:1) was stirred in the presence of 10% palladium on carbon (Pd/C, 107 mg) under hydrogen (40 psi). After 4 h, the reaction mixture was filtered through Celite. The filtrate was concentrated under vacuum. The residue was purified by silica gel column chromatography (10% 9:1 MeOH:NH₄OH in CH₂Cl₂), followed by trituration with 1:1 hexanes/CH₂Cl₂, yielding the title compound (76 mg, 56%) as an off-white solid: m.p. 224-229° C.; MS m/z 375.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.84 (1H, s), 8.61 (1H, s), 8.34 (1H, s), 7.90 (1H, d, J=8 Hz), 7.30 (2H, m), 3.05 (2H, d, J=12 Hz), 2.77 (3H, s), 2.73 (1H, tt, J=12 Hz, 3.5 Hz), 2.59 (2H, td, J=12 Hz, 2.5 Hz), 2.38 (3H, s), 2.20 (1H, br s), 1.73 (2H, d, J=12 Hz), 1.54 (2H, qd, J=12 Hz, 3.5 Hz).

Example 52 Preparation of Cpd 128

Step A: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (0.285 g, 1.0 mmol, prepared in Example 36, Part 2) and 6-chloropyridazin-3-amine (0.13 g, 1.0 mmol) in EtOH (2.0 mL) was stirred at 95° C. for 3 h. The mixture was cooled to room temperature and diluted with water to produce a precipitate. The solid was collected by vacuum filtration, washed with water and dried to give 3-(6-chloroimidazo[1,2-b]pyridazin-2-yl)-7-fluoro-2H-chromen-2-one hydrobromide (0.26 g, 82%) as a tan solid. MS m/z 316.1 [M+H]⁺. Step B: A mixture of 3-(6-chloroimidazo[1,2-b]pyridazin-2-yl)-7-fluoro-2H-chromen-2-one hydrobromide (95 mg, 0.3 mmol), 1-methylpiperazine (75 mg, 0.75 mmol) in DMSO (0.5 mL) was stirred at 95° C. for 2 h. The mixture was cooled to room temperature and diluted with water to produce a precipitate. The solid was collected by vacuum filtration, washed with water, dried and purified with silica gel column chromatography (5-10% MeOH in CH₂Cl₂) to give 3-(6-chloroimidazo[1,2-b]pyridazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one (56 mg, 50%) as a yellow solid. MS m/z 396.2 [M+H]⁺. Step C: A suspension of 3-(6-chloroimidazo[1,2-b]pyridazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one (50 mg, 0.13 mmol) in a mixed solvent of CH₂Cl₂ (2.0 mL) and MeOH (5.0 mL) was stirred with 10% Pd/C (20 mg) under hydrogen (1 atm) for 4 h. The mixture was filtered through Celite. The filtrate was concentrated. The residue was suspended in water, collected by vacuum filtration and dried to give the title compound (30 mg, 66%) as a yellow solid: m.p. 284-285° C.; MS m/z 362.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.78 (1H, s), 8.63 (1H, s), 8.52 (1H, dd, J=4.4 Hz, 1.6 Hz), 8.11 (1H, d, J=9.5 Hz), 7.74 (1H, d, J=8.2 Hz), 7.28 (1H, dd, J=9.5 Hz, 4.4 Hz), 7.06 (1H, d, J=9.2 Hz), 6.95 (1H, s), 3.53-3.32 (4H, m), 2.48 (3H, s), 2.38-2.15 (4H, m).

Example 53 Preparation of Cpd 617

Step A: A mixture of 3-chloro-6-methylpyridazine (516 mg, 4.0 mmol), NH₄OH (30%, 3 mL) and copper(II) sulfate pentahydrate (26 mg, 0.2 mmol) was stirred at 120° C. for 40 h. The mixture was cooled to room temperature and partitioned between EtOAc and brine. The aqueous layer was extracted with EtOAc five times. The combined organics were dried over NaSO₄, filtered, concentrated and purified by silica gel column chromatography (0-10% MeOH in CH₂Cl₂) to give 6-methylpyridazin-3-amine (160 mg, 37%) as a white solid. MS m/z 109.9 [M+H]⁺.

Step B: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (900 mg, 3.0 mmol, prepared in Example 36, Part 2) and 6-methylpyridazin-3-amine (330 mg, 3.0 mmol) was stirred in CH₃CN (6.0 mL) at 100° C. for 5 h, then the solvent was removed. The residue was purified by silica gel column chromatography (5% MeOH in CH₂Cl₂) to give 7-fluoro-3-(6-methylimidazo[1,2-b]pyridazin-2-yl)-2H-chromen-2-one (814 mg, 92%) as a tan solid. MS m/z 296.0 [M+H]⁺.

Step C: A mixture of 7-fluoro-3-(6-methylimidazo[1,2-b]pyridazin-2-yl)-2H-chromen-2-one (100 mg, 0.34 mmol) and cis-2,6-dimethylpiperazine (155 mg, 1.36 mmol) in DMSO (0.5 mL) was stirred at 100° C. overnight. The mixture was diluted with water to produce a precipitate. The solid was collected by vacuum filtration, dried under vacuum and purified by silica gel column chromatography (5% MeOH in CH₂Cl₂) to give the title compound (75 mg, 58%) as a yellow solid: m.p. 225-227° C.; MS m/z 390.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.64 (1H, s), 8.52 (1H, s), 7.66 (1H, d, J=9.4 Hz), 7.35 (1H, d, J=8.8 Hz), 6.81 (1H, d, J=9.4 Hz), 6.73 (1H, dd, J=8.8 Hz, 2.2 Hz), 6.66 (1H, d, J=2.2 Hz), 3.68-3.56 (2H, m), 3.12-2.96 (2H, m), 2.71-2.54 (2H, m), 2.46 (3H, s), 1.30-1.10 (6H, br s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 53 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 54 Preparation of Cpd 458

Step A: Following the procedure in Example 46, Step A, 6-chloropyrimidin-4-amine (1.3 g, 10 mmol) and sodium methanethiolate (1.05 g, 15 mmol) in DMF (10 mL) afforded 6-(methylthio)pyrimidin-4-amine (1.06 g, 75%). MS m/z 142.1 [M+H]⁺.

Step B: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (2.5 g, 8.86 mmol, prepared in Example 36, Part 2) and 6-(methylthio)pyrimidin-4-amine (1.0 g, 7.1 mmol) in CH₃CN (35 mL) was stirred at 120° C. overnight. The mixture was cooled to room temperature and diluted with EtOAc to produce a precipitate. The solid was collected by vacuum filtration, washed with EtOAc and dried under vacuum to afford 7-fluoro-3-(7-(methylthio)imidazo[1,2-c]pyrimidin-2-yl)-2H-chromen-2-one hydrobromide salt (2.8 g, 97%) as a tan solid. MS m/z 328.1 [M+H]⁺.

Step C: A mixture of 7-fluoro-3-(7-(methylthio)imidazo [1,2-c]pyrimidin-2-yl)-2H-chromen-2-one hydrobromide (100 mg, 0.24 mmol) and 1-methylpiperazine (60 mg, 0.6 mmol) in DMSO (0.5 mL) was stirred at 120° C. for 5 h. After cooling to room temperature, the mixture was diluted with water to produce a precipitate. The solid was collected by vacuum filtration, dried under vacuum and purified by silica gel column chromatography (5% MeOH in CH₂Cl₂) to give 7-(4-methylpiperazin-1-yl)-3-(7-(methylthio)imidazo [1,2-c]pyrimidin-2-yl)-2H-chromen-2-one (68 mg, 69%) as a yellow solid. MS m/z 408.2 [M+H]⁺.

Step D: Following the procedure in Example 47, 7-(4-methylpiperazin-1-yl)-3-(7-(methylthio)imidazo[1,2-c]pyrimidin-2-yl)-2H-chromen-2-one (66 mg, 0.16 mmol) and excess Raney Ni in dimethylacetamide (2.0 mL) yielded the title compound (32 mg, 55%) as a yellow solid: m.p. 253-255° C.; MS m/z 362.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.03 (1H, s), 8.71 (1H, s), 8.56 (1H, s), 7.95 (1H, d, J=6.3 Hz), 7.54-7.44 (2H, m), 6.88 (1H, dd, J=8.8 Hz, 2.2 Hz), 6.79 (1H, d, J=2.2 Hz), 3.48 (4H, br s), 2.67 (4H, br s), 2.44 (3H, br s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 54 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 55 Preparation of Cpd 441

Step A: A mixture of 3-acetyl-7-fluoro-2H-chromen-2-one (600 mg, 2.0 mmol, prepared in Example 36, Part 2) and 5-methyl-1,3,4-thiadiazol-2-amine (241 mg, 2.0 mmol) in EtOH (6.0 mL) was stirred at 95° C. overnight in a sealed tube. The mixture was cooled to room temperature and diluted with an aqueous saturated NaHCO₃ solution to produce a precipitate. The solid was collected by vacuum filtration, washed with water and dried under vacuum to give 7-fluoro-3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-2H-chromen-2-one (1.2 g, 62%) as a tan solid. MS m/z 303.2 [M+H]⁺.

Step B: A mixture of 7-fluoro-3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-2H-chromen-2-one (76 mg, 0.25 mmol), piperazine (64 mg, 0.75 mmol), K₂CO₃ (104 mg, 0.75 mmol) in DMSO (0.5 mL) was stirred at 120° C. overnight. After cooling to room temperature, the mixture was diluted with water to produce a precipitate. The solid was collected by vacuum filtration, dried under vacuum and purified by silica gel column chromatography (10% MeOH in CH₂Cl₂) to afford the title compound (23 mg, 25%) as a yellow solid: m.p. 288-290° C.; MS m/z 368.2 [M+H]⁺; ¹H NMR (500 MHz, MeOD-d₄): δ 8.43 (1H, s), 8.40 (1H, s), 7.54 (1H, d, J=8.8 Hz), 7.01 (1H, dd, J=8.8 Hz, 2.5 Hz), 6.84 (1H, d, J=2.2 Hz), 3.39-3.35 (4H, m), 3.00-2.95 (4H, m), 2.74 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 55 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 56 Preparation of Cpd 391 Part 1: Preparation of 3-(2-bromoacetyl)-5,7-difluoro-2H-chromen-2-one

Step A: A mixture of 2,4-difluoro-6-hydroxybenzaldehyde (8 g, 50.6 mmol), ethyl acetoacetate (6.4 mL, 50.7 mmol) and piperidine (240 μL, 2.43 mmol) was heated at 50° C. for 15 h. The reaction mixture was cooled to room temperature, and then suspended in ether. The mixture was filtered. The solid material was purified by silica gel column chromatography (50-70% CH₂Cl₂ in hexanes), yielding 3-acetyl-5,7-difluoro-2H-chromen-2-one (4.45 g, 39%) as an off-white solid. ¹H NMR (500 MHz, CDCl₃): δ 8.69 (1H, s), 6.93 (1H, dt, J=9 Hz, 2 Hz), 6.84 (1H, td, J=9 Hz, 2 Hz), 2.72 (3H, s).

Step B: A mixture of 3-acetyl-5,7-difluoro-2H-chromen-2-one (4.25 g, 19.0 mmol), tetrabutylammonium tribromide (9.85 g, 20.4 mmol) and THF (77 mL) was stirred at room temperature for 3 h, then the solvent was removed under vacuum. The residue was triturated with 1:1 hexane/CH₂Cl₂, yielding the title compound (3.31 g, 57%) as an off-white solid: MS m/z [303.0, 305.0][M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.80 (1H, s), 6.96 (1H, m), 6.87 (1H, td, J=8.5 Hz, 2.5 Hz), 4.69 (2H, s).

Part 2: Preparation of Cpd 391

Step A: A mixture of 3-(2-bromoacetyl)-5,7-difluoro-2H-chromen-2-one (160 mg, 0.53 mmol), 4-trifluoromethylpyridin-2-amine (100 mg, 0.62 mmol), and EtOH (1 mL) was heated at 80° C. for 1 h. The reaction mixture was partitioned between CH₂Cl₂ and an aqueous saturated NaHCO₃ solution. The organic layer was dried over MgSO₄, filtered, and was concentrated under vacuum. The residue was purified by silica gel column chromatography (CH₂Cl₂), followed by trituration with 2:1 hexane/acetone, yielding 5,7-difluoro-3-(7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (92 mg, 47%) as a white solid. ¹H NMR (500 MHz, CDCl₃): δ 8.98 (1H, s), 8.64 (1H, s), 8.27 (1H, d, J=7.5 Hz), 7.95 (1H, s), 7.01 (1H, dd, J=7 Hz, 1.5 Hz), 6.96 (1H, d, J=9 Hz), 6.86 (1H, td, J=9 Hz, 2.5 Hz).

Step B: A mixture of 5,7-difluoro-3-(7-(trifluoromethyl) imidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (60 mg, 0.16 mmol), cis-2,6-dimethylpiperazine (27 mg, 0.24 mmol) and DMSO (300 μL) was heated at 80° C. for 15 h. The addition of an aqueous saturated NaHCO₃ solution resulted in the formation of a precipitate. The precipitate was collected by vacuum filtration and purified by silica gel column chromatography (5% MeOH in CH₂Cl₂), yielding the title compound (58 mg, 79%) as a yellow solid: m.p. 210-219° C.; MS m/z 461.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.85 (1H, d, J=7 Hz), 8.72 (1H, s), 8.65 (1H, s), 8.08 (1H, s), 7.20 (1H, dd, J=7 Hz, 2 Hz), 6.96 (1H, dd, J=9 Hz, 2 Hz), 6.78 (1H, d, J=1.5 Hz), 3.88 (2H, d, J=12 Hz), 2.76 (2H, m), 2.37 (2H, t, J=11Hz), 2.31 (1H, br s), 1.04 (6H, d, J=6.5 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 56 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 57 Preparation of Cpd 529

Step A: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (570 mg, 2 mmol, prepared in Example 36, Part 2) and 2-methylpyridine (186 mg, 2 mmol) in anhydrous acetone (2 mL) was heated to 50° C. for 16 h in a sealed tube. After cooling to room temperature, the reaction mixture was filtered. The collected material was washed with a small amount of CH₃CN to provide 1-(2-(7-fluoro-2-oxo-2H-chromen-3-yl)-2-oxoethyl)-2-methyl-pyridinium bromide (590 mg, 78%) as a light brown solid. MS m/z 298.1 [M+H]⁺.

Step B: 1-(2-(7-Fluoro-2-oxo-2H-chromen-3-yl)-2-oxoethyl)-2-methyl-pyridinium bromide (590 mg, 1.6 mmol) was suspended in CH₃CN (10 mL) and triethylamine (2.5 mL). The mixture was heated at reflux for 2 h. After cooling to room temperature, the mixture was filtered. The collected material was washed with CH₃CN to provide 7-fluoro-3-(indolizin-2-yl)-2H-chromen-2-one (360 mg, 83%) as a yellow solid. MS m/z 280.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.54 (1H, s), 8.33 (1H, dd, J=7.0 Hz, 1Hz), 8.29 (1H, d, J=1Hz), 7.85 (1H, m), 7.45-7.42 (2H, m), 7.30 (1H, td, J=8.5 Hz, 2.5 Hz), 6.94 (1H, s), 6.74 (1H, m), 6.55 (1H, td, J=7.0 Hz, 1.5 Hz).

Step C: A mixture of 7-fluoro-3-(indolizin-2-yl)-2H-chromen-2-one (60 mg, 0.21 mmol) and piperazine (36 mg, 0.42 mmol) in anhydrous DMSO (0.3 mL) was heated to 60° C. for 16 h in a sealed tube. The mixture was purified by column chromatography on basic alumina (0-10% MeOH in CH₂Cl₂) to provide the title compound (39 mg, 52%) as a brown solid: m.p. 186-188° C.; MS m/z 346.4 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.35 (1H, s), 8.29 (1H, dd, J=7.0 Hz, 1Hz), 8.22 (1H, d, J=2.5 Hz), 7.55 (1H, d, J=8.5 Hz), 7.38 (1H, d, J=8.5 Hz), 7.0 (1H, dd, J=8.5 Hz, 2.5 Hz), 6.88 (1H, s), 6.84 (1H, d, J=2.5 Hz), 6.70 (1H, m), 6.52 (1H, m), 3.29-3.27 (4H, m), 2.85-2.84 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 57 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 58 Preparation of Cpd 588

Step A: A mixture of 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (1.0 g, 3.5 mmol) and 2,5-dimethylpyrazine (750 mg, 7.0 mmol, prepared in Example 36, Part 2) in anhydrous CH₃CN (4 mL) was heated to 60° C. for 3 d in a sealed tube. After cooling to room temperature, the reaction mixture was filtered. The collected material was washed with a small amount of CH₃CN to provide crude 14247-fluoro-2-oxo-2H-chromen-3-yl)-2-oxoethyl)-2,5-dimethylpyrazin-1-ium bromide (1.8 g) as a light brown solid. MS m/z 313.3 [M+H]⁺.

Step B: The crude intermediate from Step A was suspended in CH₃CN (20 mL) and triethylamine (5 mL). The mixture was heated to reflux for 2 h, then cooled and filtered. The collected material was washed with a small amount of CH₃CN to provide 7-fluoro-3-(indolizin-2-yl)-2H-chromen-2-one (850 mg, 83% over 2 steps) as an orange solid. MS m/z 295.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.82 55 (1H, s), 8.62 (1H, s), 8.34 (1H, s), 8.16 (1H, s), 7.86 (1H, m), 7.47 (1H, d, J=2.5 Hz), 7.34-7.31 (2H, m), 2.37 (3H, s).

Step C: Following the procedure in Example 57, Step C, 7-fluoro-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one (50 mg, 0.17 mmol) and piperazine (30 mg, 0.34 mmol) in DMSO (0.5 mL) yielded the title compound (21 mg, 34%) as a yellow solid: m.p. 220° C. (dec.); MS m/z 361.4 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.77 (1H, s), 8.45 (1H, s), 8.29 (1H, s), 8.14 (1H, s), 7.58 (1H, d, J=8.5 Hz), 7.28 (1H, s), 7.04 (1H, dd, J=9 Hz, 2.5 Hz), 6.90 (1H, d, J=2.5 Hz), 3.40-3.36 (4H, m), 2.99-2.97 (4H, m), 2.38 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 58 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 59 Preparation of Cpd 579

Step A: A mixture of 4-chloro-2-methylpyrimidine (512 mg, 4 mmol) and sodium methanethiolate (280 mg, 4 mmol) in anhydrous CH₃CN (4 mL) was heated to 60° C. for 16 h. After cooling to room temperature, the mixture was filtered. The collected material was washed with CH₂Cl₂. The combined filtrate was concentrated to provide crude 2-methyl-4-(methylthio)pyrimidine, which was used in the following step without further purification.

Step B: A mixture of the crude product from Step A and 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (855 mg, 3.0 mmol, prepared in Example 36, Part 2) in anhydrous CH₃CN (4 mL) was heated to 60° C. for 3 days in a sealed tube. The mixture was cooled to room temperature and filtered. The collected material was washed with a small amount of CH₃CN to provide crude 1-(2-(7-fluoro-2-oxo-2H-chromen-3-yl)-2-oxoethyl)-2-methyl-4-(methylthio)pyrimidin-1-ium bromide (822 mg) as a light brown solid, which was used in the following step without further purification.

Step C: The crude product from Step B was suspended in CH₃CN (10 mL) and triethylamine (2.5 mL). The mixture was heated to reflux for 2 h, then cooled and filtered. The collected material was washed with CH₃CN, affording 7-fluoro-3-(2-(methylthio)pyrrolo[1,2-a]pyrimidin-7-yl)-2H-chromen-2-one (1.0 g, 77% over three steps) as a brown solid. MS m/z 327.1 [M+H]⁺.

Step D: To a solution of 7-fluoro-3-(2-(methylthio)pyrrolo[1,2-a]pyrimidin-7-yl)-2H-chromen-2-one (100 mg, 0.31 mmol) in dimethylacetamide (3 mL) was carefully added Raney Ni (slurry in H₂O, ˜50 mg) at 60° C. After 15 min, additional Raney Ni was added in small portions until UPLC/MS indicated complete conversion. After cooling to room temperature, the reaction mixture was filtered through Celite. The filter cake was washed with CH₂Cl₂. The filtrate was concentrated, providing 7-fluoro-3-(pyrrolo[1,2-a]pyrimidin-7-yl)-2H-chromen-2-one (60 mg, 69% yield) as a brown gummy oil. MS m/z 281.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.75 (1H, m), 8.65 (1H, s), 8.26 (1H, d, J=1Hz), 8.13 (1H, m), 7.86 (1H, m), 7.45 (1H, dd, J=9.5 Hz, 2.5 Hz), 7.31 (1H, td, J=8.5 Hz, 2.5 Hz), 7.07 (1H, s), 6.70 (1H, m).

Step E: Following the procedure in Example 57, Step C, 7-fluoro-3-(pyrrolo[1,2-a]pyrimidin-7-yl)-2H-chromen-2-one (60 mg, 0.21 mmol) and piperazine (36 mg, 0.42 mmol) in DMSO (0.5 mL) yielded the title compound (28 mg, 38%) as a yellow solid: m.p. 235-238° C.; MS m/z 347.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.70 (1H, dd, J=2 Hz, 1 Hz), 8.47 (1H, s), 8.20 (1H, d, J=1.5 Hz), 8.09 (1H, dd, J=3.5 Hz, 1.5 Hz), 7.57 (1H, d, J=8.5 Hz), 7.04-7.01 (2H, m), 6.86 (1H, d, J=2.5 Hz), 6.67-6.65 (1H, m), 3.31-3.29 (4H, m), 2.87-2.85 (4H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 59 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 60 Preparation of Cpd 641

Step A: A mixture of hexane-2,5-dione (6 mL, 51 mmol) and hydrazine monohydrate (2.5 mL, 51 mmol) in ethanol (50 mL) was brought to reflux for 3 h, then the solvent was removed under reduced pressure. The residue was combined with 10% Pd/C (1.1 g) in anhydrous benzene (200 mL). The reaction mixture was heated at reflux overnight, then cooled to room temperature and filtered through a pad of Celite. The filtrate was concentrated and purified by silica gel column chromatography (6% MeOH in CH₂Cl₂) to provide 3,6-dimethylpyridazine (3.1 g, 56%) as a light brown oil. ¹H NMR (500 MHz, CDCl₃): δ 7.23 (2H, s), 2.69 (6H, s).

Step B: A mixture of 3,6-dimethylpyridazine (81 mg, 0.75 mmol) and 3-(2-bromoacetyl)-7-fluoro-2H-chromen-2-one (143 mg, 0.5 mmol, prepared in Example 36, Part 2) in anhydrous CH₃CN (1 mL) was stirred at room temperature for 5 d in a sealed tube to afford 1-(2-(7-fluoro-2-oxo-2H-chromen-3-yl)-2-oxoethyl)-3,6-dimethylpyridazin-1-ium bromide as a crude mixture in CH₃CN.

Step C: The crude reaction mixture from Step B was diluted with anhydrous CH₃CN (2 mL) and triethylamine (1 mL). The mixture was heated at reflux for 2 h, then cooled and filtered. The collected material was washed with CH₃CN, affording 7-fluoro-3-(2-methylpyrrolo[1,2-b]pyridazin-6-yl)-2H-chromen-2-one (103 mg, 70%) as a brown solid. MS m/z 295.0 [M+H]⁺.

Step D: Following the procedure in Example 57, Step C, 7-Fluoro-3-(2-methylpyrrolo[1,2-b]pyridazin-6-yl)-2H-chromen-2-one (40 mg, 0.13 mmol) and piperazine (22 mg, 0.26 mmol) in DMSO (0.5 mL) yielded the title compound (24 mg, 48%) as a light brown solid: m.p. 213-216° C.; MS m/z 361.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.23 (1H, s), 8.15 (1H, d, J=1.5 Hz), 7.68 (1H, d, J=9 Hz), 7.39 (1H, d, J=9 Hz), 6.87-6.83 (2H, m), 6.74 (1H, d, J=2 Hz), 6.43 (1H, d, J=9 Hz), 3.27-3.22 (4H, m), 2.84-2.83 (4, m), 2.33 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 60 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 61 Preparation of Cpd 630

Step A: To an oven dry round bottom flask were added thieno-5-pyridine (0.6 g, 4.4 mmol), triisopropyl borate (1.38 mL, 6.8 mmol) and THF (16 mL). The mixture was cooled to −78° C. under nitrogen before the addition of LDA (3.6 mL, 1.5 M, 5.2 mmol) with stirring. After 1 h the reaction mixture was poured onto ice water (20 mL) and acidified to pH 2 with 2 N HCl. The precipitate was collected by filtration, washed with water and dried to provide thieno-5-pyridine-2-boronic acid (0.7 g, 88%). MS m/z 135.0 [M+H]⁺.

Step B: A mixture of thieno-5-pyridine-2-boronic acid (0.59 g, 3.29 mmol), 3-bromo-7-fluoro-2H-chromen-2-one (1.0 g, 4.12 mmol, prepared in Example 32, Step A), tris(dibenzylideneacetone)dipalladium(0) (0.19 g, 0.21 mmol), tri-tert-butylphosphonium tetrafluoroborate (0.14 g, 0.49 mmol) and potassium fluoride (1.21 g, 20.57 mmol) in THF (10 mL) was stirred at 50° C. under Argon for 15 h. The mixture was then diluted with 10% MeOH in CH₂Cl₂ (100 mL) and filtered through Celite. The filtrate was concentrated. The residue was washed with CH₂Cl₂ and dried to give 7-fluoro-3-(thieno[3,2-c]pyridin-2-yl)-2H-chromen-2-one (0.43 g, 43%). MS m/z 298.0 [M+H]⁺.

Step C: A mixture of 7-fluoro-3-(thieno[3,2-c]pyridin-2-yl)-2H-chromen-2-one (75 mg, 0.25 mmol), (2S,6R)-2,6-dimethylpiperazine (57 mg, 0.50 mmol) and DMSO (1.0 mL) was stirred at 90° C. overnight. The mixture was cooled to room temperature and diluted with water (10 mL) to produce a precipitate. The precipitate was collected by filtration, washed with water and ethyl ether, and then dried to give the title compound (20 mg, 21%): m.p. 163-165° C.; MS 392.3 m/z [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.11 (1H, d, J=1.0 Hz), 8.60 (1H, s), 8.39 (1H, d, J=5.4 Hz), 8.19 (1H, s), 8.03 (1H, d, J=5.7 Hz), 7.62 (1H, d, J=8.8 Hz), 7.07 (1H, dd, J=8.8 Hz, 2.2 Hz), 6.91 (1H, d, J=2.5 Hz), 3.93-3.85 (2H, m), 2.84-2.74 (2H, m), 2.41-2.33 (2H, m), 1.04 (6H, d, J=6.3 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 61 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 62 Preparation of Cpd 705 Part 1: Preparation of 4-chloro-5-iodo-2,6-dimethylpyrimidine

Step A: 2,6-Dimethylpyrimidin-4-ol (5.0 g, 40 mmol) was dissolved in aqueous NaOH solution (50 mL, 1 M, 50 mmol). To the solution was added iodine (10.2 g, 40 mmol). The mixture was gradually heated to 80° C. and stirred for 2 h. After cooling the mixture to room temperature, acetic acid was added to adjust the pH ˜6. A precipitate formed and was collected by filtration. The solid was washed with water and dried to give 5-iodo-2,6-dimethylpyrimidin-4-ol (6.51 g, 65%). MS m/z 251.2 [M+H]⁺.

Step B: 5-Iodo-2,6-dimethylpyrimidin-4-ol (4.6 g, 18.4 mmol) was combined with phosphorus oxychloride (15 mL). The mixture was stirred at 110° C. for 2 h, then the solvent was removed under vacuum. The residue was dissolved in CH₂Cl₂ and washed with an aqueous saturated NaHCO₃ solution and brine. The organic layer was concentrated and purified by silica gel column chromatography (0-10% EtOAc in CH₂Cl₂) to give the title compound (3.86 g, 78%) as colorless oil that solidified on standing. MS m/z 269.2 [M+H]⁺.

Part 2: Preparation of Cpd 705

Step A: A mixture of 3-bromo-7-fluorocoumarin (1.82 g, 7.5 mmol, prepared in Example 38, Step A), ethynyltrimethylsilane (0.88 g, 9.0 mmol), copper(I) iodide (0.071 g, 0.38 mmol), bis(triphenylphosphine)palladium(II) dichloride (0.26 g, 0.38 mmol), triethylamine (1.52 g, 15.0 mmol) and CH₃CN (15 mL) was stirred under an Argon atmosphere at room temperature for 12 h, then the solvent was removed. The residue was purified by silica gel column chromatography (0-50% EtOAc in hexanes) to give 7-fluoro-3-((trimethylsilyl)ethynyl)-2H-chromen-2-one as white solid, used directly for the next step. MS m/z 261.2 [M+H]⁺.

Step B: The intermediate obtained in Step A was dissolved in MeOH (50 mL) and cooled in an ice-water bath. K₂CO₃ (1.55 g, 11.25 mmol) was added and the mixture was stirred at 0° C. for 1.5 h. Saturated aqueous NH₄Cl (200 mL) was added to produce a precipitate. The precipitate was collected, washed with water, dried and purified by silica gel column chromatography (0-10% EtOAc in CH₂Cl₂) to give 3-ethynyl-7-fluoro-2H-chromen-2-one (1.14 g, 81% two steps) as white needles. MS m/z 189.2 [M+H]⁺.

Step C: A mixture of 3-ethynyl-7-fluoro-2H-chromen-2-one (376 mg, 2.0 mmol), 4-chloro-5-iodo-2,6-dimethylpyrimidine (590 mg, 2.2 mmol), copper(I) iodide (19 mg, 0.1 mmol), bis(triphenylphosphine)palladium(II) dichloride (70 mg, 0.1 mmol), triethylamine (404 mg, 4.0 mmol) and CH₃CN (4.0 mL) was stirred at 50° C. under an Argon atmosphere overnight, then the solvent was removed under reduced pressure. The residue was purified by silica gel column chromatography (5% MeOH in CH₂Cl₂) to give 3-((4-chloro-2,6-dimethylpyrimidin-5-yl)ethynyl)-7-fluoro-2H-chromen-2-one (92 mg, 14%). MS m/z 329.3 [M+H]⁺.

Step D: 3-((4-Chloro-2,6-dimethylpyrimidin-5-yl)ethynyl)-7-fluoro-2H-chromen-2-one (92 mg, 0.28 mmol) was stirred with sodium hydrosulfide (47 mg, 0.84 mmol) in EtOH (2.0 mL) at 80° C. for 1 h. The mixture was cooled to room temperature and diluted with water (8 mL) to produce a precipitate. The precipitate was collected, washed with water and dried to give 3-(2,4-dimethylthieno[2,3-d]pyrimidin-6-yl)-7-fluoro-2H-chromen-2-one as white powder (66 mg, 73%). MS m/z 327.3 [M+H]⁺.

Step E: 3-(2,4-Dimethylthieno[2,3-d]pyrimidin-6-yl)-7-fluoro-2H-chromen-2-one (66 mg, 0.2 mmol), piperazine (43 mg, 0.5 mmol) in DMSO (0.5 mL) was stirred at 80° C. for 6 h. The mixture was cooled to room temperature and diluted with water (6 mL) to produce a precipitate. The precipitate was collected, washed with water and dried to give the title compound (75 mg, 96%) as yellow powder: m.p. 275° C. (decomp.); MS m/z 393.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.65 (1H, s), 8.15 (1H, s), 7.60 (1H, d, J=8.83 Hz), 7.05 (1H, dd, J=9.0 Hz, 2.4 Hz), 6.89 (1H, d, J=2.5 Hz), 3.38-3.33 (4H, m), 2.84-2.79 (4H, m), 2.74 (3H, s), 2.66 (3H, s).

Example 63 Preparation of Cpd 698

Step A: 6-Methylpyridin-3-ol (0.5 g, 4.58 mmol) was dissolved in aqueous NaOH (4.5 mL, 1 M, 4.5 mmol). To the solution was added iodine (1.28 g, 5.2 mmol) and the mixture was stirred at room temperature overnight. The mixture was neutralized with aqueous HCl (2 M) to pH ˜7. A white precipitate formed and was collected by filtration. The solid was washed with water and dried to give 2-iodo-6-methylpyridin-3-ol (0.8 g, 50%). MS m/z 236.0 [M+H]⁺.

Step B: A mixture of 2-iodo-6-methylpyridin-3-ol (325 mg, 1.38 mmol) and 3-ethynyl-7-fluoro-2H-chromen-2-one (200 mg, 1.06 mmol, prepared in Example 62, Part 2), bis(triphenylphosphine)palladium(II) dichloride (37 mg, 0.05 mmol), copper(I) iodide (10 mg, 0.05 mmol), triethylamine (0.25 mL, 2.12 mmol) in CH₃CN (3.0 mL) was stirred under an Argon atmosphere at 40° C. for 4 h. The mixture was diluted with water (50 mL) to produce a precipitate. The precipitate was collected, washed with ethyl ether and dried to give 3-(5-methylfuro[3,2-b]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one (142 mg, 48%). MS m/z 297.2 [M+H]⁺.

Step C: A mixture of 3-(5-Methylfuro[3,2-b]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one (100 mg, 0.33 mmol), 1-methylpiperazine (67 mg, 0.67 mmol) in DMSO (1 mL) was stirred at 90° C. for 2 h. The mixture was cooled to room temperature and diluted with water (10 mL) to produce a precipitate. The precipitate was collected by filtration, washed with water and dried to give the title compound (99 mg, 80%) as a yellow solid: m.p. 178-180° C.; MS 376.0 m/z [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.22 (1H, s), 7.64 (1H, d, J=0.95 Hz), 7.54 (1H, dd, J=8.5 Hz, 1.0 Hz), 7.39 (1H, d, J=8.8 Hz), 7.00 (1H, d, J=8.5 Hz), 6.80 (1H, dd, J=8.8 Hz, 2.5 Hz), 6.68 (1H, d, J=2.2 Hz), 3.38-3.33 (4H, m), 2.59 (3H, s), 2.54-2.47 (4H, m), 2.30 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 63 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 64 Preparation of Cpd 723

Step A: 2,6-Dimethylpyridin-3-ol (1.0 g, 8.1 mmol) was dissolved in aqueous NaOH (4.05 mL, 2 M, 8.1 mmol). To the solution was added iodine (2.62 g, 10.3 mmol) at room temperature. The mixture was stirred at 50° C. for 2 h, then neutralized (pH ˜7) with aqueous HCl (2 N). Excess reagent was quenched with sodium thiosulfate, then the solvent was removed under vacuum. The residue was suspended in 10% MeOH in CH₂Cl₂ (100 mL) and filtered. The filtrate was concentrated to give 4-iodo-2,6-dimethylpyridin-3-ol (0.96 g, 50%). MS m/z 250.0 [M+H]⁺.

Step B: A mixture of 4-iodo-2,6-dimethylpyridin-3-ol (343 mg, 1.38 mmol), 3-ethynyl-7-fluoro-2H-chromen-2-one (200 mg, 1.06 mmol, prepared in Example 62, Step B), bis(triphenylphosphine)palladium(II) dichloride (37 mg, 0.05 mmol), copper(I) iodide (10 mg, 0.05 mmol), triethylamine (0.25 mL, 2.12 mmol) in DMF (3.0 mL) was stirred under an Argon atmosphere at 40° C. overnight. The mixture was diluted with water (50 mL) to produce a precipitate. The precipitate was collected to give 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-fluoro-2H-chromen-2-one (185 mg, 60%). MS m/z 311.2 [M+H]⁺.

Step C: A mixture of 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-fluoro-2H-chromen-2-one (100 mg, 0.32 mmol), piperazine (58 mg, 0.67 mmol) in DMSO (1.0 mL) was stirred at 90° C. for 2 h. The mixture was cooled to room temperature and diluted with water (10 mL) to produce a precipitate. The precipitate was collected by filtration, washed with water and dried to give the title compound (89 mg, 74%) as yellow powder: m.p. 218-220° C.; MS 376.0 m/z [M+H]⁺; ¹H NMR (500 MHz, CDCl₃): δ 8.36 (1H, s), 7.56-7.49 (2H, m), 7.21 (1H, s), 6.92-6.87 (1H, m), 6.77-6.74 (1H, m), 3.39 (4H, m, J=10.4 Hz), 3.09-3.03 (4H, m), 2.79 (3H, s), 2.61 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 64 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 65 Preparation of Cpd 321

Step A: Diisopropyl azodicarboxylate (5.5 mL, 28 mmol) was added dropwise to a mixture of 7-hydroxycoumarin (4.6 g, 28 mmol), (R)-tert-butyl 3-hydroxypyrrolidine-1-carboxylate (6.0 g, 31 mmol), triphenylphosphine (7.4 g, 28 mmol) and triethylamine (3.9 mL, 28 mmol) in THF (28 mL) at 0° C. The mixture was stirred at room temperature overnight. The solids were removed by filtration and washed with cold THF. The solid was dissolved in EtOAc. The solution was washed with aqueous HCl (0.5 N), dried over NaSO₄, then filtered and concentrated to give (S)-tert-butyl 3-(2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate (4.85 g, 52%) as a pale yellow solid. MS m/z 232.2 [M-Boc+H]⁺.

Step B: Into a mixture of (S)-tert-butyl 3-(2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate (1.5 g, 3.6 mmol) and sodium acetate (1.0 g, 12.8 mmol) in acetic acid (11.0 mL) was added bromine (0.186 mL, 3.6 mmol) dropwise at room temperature. The mixture was stirred at room temperature overnight, then the solvent was removed and the residue was purified by silica gel column chromatography (0-60% EtOAc in hexanes) to afford (S)-tert-butyl 3-(3-bromo-2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate (2.9 g, 80%) as a pale yellow solid. MS m/z 312.1 [M-Boc+H]⁺.

Step C: A mixture of (S)-tert-butyl 3-(3-bromo-2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate (1.2 g, 2.9 mmol), tributyl(1-ethoxyvinyl)stannane (1.2 g, 3.2 mmol), copper(I) iodide (0.13 g, 0.7 mmol) and tetrakis(triphenylphosphine)palladium(0) (0.34 g, 0.29 mmol) in 1,4-dioxane (30 mL) was stirred at 100° C. for 2 h under Argon. The mixture was partitioned between EtOAc and water. The organic layer was washed with brine, dried over NaSO₄, filtered and concentrated. The residue was purified by silica gel column chromatography (0-35% EtOAc in CH₂Cl₂) to afford (S)-tert-butyl 3-(3-(1-ethoxyvinyl)-2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate (1.84 g, 65%) as a pale yellow solid. MS m/z 402.3 [M+H]⁺.

Step D: Into a solution of (S)-tert-butyl 3-(3-(1-ethoxyvinyl)-2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate (0.78 g, 1.84 mmol) in THF (10 mL) and water (1 mL) was added N-bromosuccinimide (0.344 g, 1.93 mmol) portionwise. The mixture was stirred at room temperature for 10 min then partitioned between EtOAc and an aqueous saturated NaHCO₃ solution. The organic layer was washed with brine, dried over NaSO₄, filtered and concentrated. The residue was purified by silica gel column chromatography (0-30% EtOAc in CH₂Cl₂) to afford (S)-tert-butyl 3-(3-(2-bromoacetyl)-2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate (0.77 g, 90%) as a pale yellow solid. MS m/z 454.1 [M+H]⁺.

Step E: A mixture of (S)-tert-butyl 3-(3-(2-bromoacetyl)-2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate (100 mg, 0.21 mmol) and 2-aminopyrimidine (20 mg, 0.21 mmol) in EtOH (0.6 mL) was stirred at 95° C. for 10 h in a sealed tube. The mixture was cooled to room temperature and diluted with an aqueous saturated NaHCO₃ solution (2.0 mL) to produce a precipitate. The solid was collected by vacuum filtration, washed with water and dried to give (S)-tert-butyl 3-(3-(2-bromoacetyl)-2-oxo-2H-chromen-7-yloxy)pyrrolidine-1-carboxylate, which was dissolved in a solution of 4 N HCl in dioxane (1.0 mL, 4.0 mmol). The mixture was stirred for 1 h at room temperature, then the solvent was removed. The residue was suspended in acetone, collected by vacuum filtration and dried to give the title compound as the hydrochloride salt (61 mg, 70%) as an off white solid: m.p. 240-250° C.; MS m/z 349.2 [M+H]⁺; ¹H NMR (500 MHz, MeOD-d₄): δ 9.27 (1H, dd, J=1.6, 6.8 Hz), 9.07 (1H, dd, J=1.6, 4.4 Hz), 8.83 (1H, s), 8.64 (1H, s), 7.83 (1H, d, J=8.2 Hz), 7.67 (1H, dd, J=4.4, 7.0 Hz), 7.17-7.12 (2H, m), 5.45-5.40 (1H, m), 3.76-3.46 (4H, m), 2.49-2.35 (2H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 65 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 66 Preparation of Cpd 20

Step A: A mixture of 2,4-dihydroxybenzaldehyde (141 mg, 1.0 mmol), ethyl 2-(benzo[d]oxazol-2-yl)acetate (195 mg, 0.95 mmol, prepared according to Example 1, Part 1), piperidine (86 mg μ L, 1.0 mmol) and acetic acid (305 mg, 5.0 mmol) in CH₃CN (1.0 mL) was stirred at 120° C. overnight, then the solvent was removed. The residue was suspended in water, collected by vacuum filtration, washed with CH₃CN and dried to yield 3-(benzo[d]oxazol-2-yl)-7-hydroxy-2H-chromen-2-one (211 mg, 76%) as a gray solid. MS m/z 280.1 [M+H]⁺.

Step B: Following the procedure in Example 65, Step A, 3-(benzo[d]oxazol-2-yl)-7-hydroxy-2H-chromen-2-one (280 mg, 1.0 mmol), tert-Butyl 4-hydroxypiperidine-1-carboxylate (227 mg, 1.1 mmol), diisopropyl azodicarboxylate (0.20 mL, 1.0 mmol), triphenylphosphine (0.27 g, 1.0 mmol), triethylamine (0.14 mL, 1.0 mmol) in THF (1.0 mL) yielded tert-Butyl 4-(3-(benzo[d]oxazol-2-yl)-2-oxo-2H-chromen-7-yloxy)piperidine-1-carboxylate (303 mg, 66%) as an off white solid. MS m/z 463.2 [M+H]⁺.

Step C: tert-Butyl 4-(3-(benzo[d]oxazol-2-yl)-2-oxo-2H-chromen-7-yloxy)piperidine-1-carboxylate was dissolved in CH₂Cl₂ (2.0 mL) and trifluoroacetic acid (1.0 mL). The mixture was stirred at room temperature for 0.5 h, then the solvent was removed. The residue was suspended in aqueous K₂CO₃ (2.0 M, 5.0 mL), collected by vacuum filtration, then washed with water, and dried to give the title compound (158 mg, 67%) as a gray solid: m.p. 198-201° C.; MS m/z 363.2 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.90 (1H, s), 7.81-7.76 (2H, m), 7.70 (1H, d, J=7.5 Hz), 7.49-7.39 (2H, m), 7.08-7.03 (2H, m), 4.77-4.69 (1H, m), 3.16-3.08 (2H, m), 2.86-2.78 (2H, m), 2.14-2.06 (2H, m), 1.81-1.69 (2H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 66 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 67 Preparation of Cpd 626

A mixture of (S)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3-methylpiperazin-1-yl)-2H-chromen-2-one (250 mg, 0.64 mmol, analogously prepared according to the procedure of Example 43), acetaldehyde (71 μL, 1.29 mmol), sodium triacetoxyborohydride (409 mg, 1.93 mmol) in CH₂Cl₂ (10% MeOH) (10 mL) was stirred at room temperature overnight. The reaction was quenched by the addition of an aqueous saturated NaHCO₃ solution. The mixture was extracted with CH₂Cl₂ (10% MeOH). The organic layer was dried over NaSO₄, filtered, concentrated and purified by silica gel column chromatography (10% MeOH in CH₂Cl₂) to give the title compound (192 mg, 72%) as a yellow solid: m.p. 208-209° C.; MS m/z 418.1 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.70 (1H, s), 8.50 (1H, s), 8.30 (1H, d, J=0.9 Hz), 7.73 (1H, d, J=8.8 Hz), 7.02 (1H, s), 6.88 (1H, d, J=1.9 Hz), 3.73 (2H, br. s.), 3.11-2.97 (1H, m), 2.91-2.82 (1H, m), 2.74 (5H, m), 2.48-2.40 (1H, m), 2.35-2.21 (5H, m), 1.06 (3H, d, J=6.3 Hz), 0.98 (3H, t)

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 67 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 68 Preparation of Cpd 773

A mixture of 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4-yl)-2H-chromen-2-one (50 mg, 0.13 mmol, prepared in Example 51), Cs₂CO₃ (150 mg, 0.46 mmol), 2-iodopropane (20 μL, 0.20 mmol) and DMF (300 μL) was heated at 60° C. for 3 h. The reaction mixture was diluted with H₂O, causing a precipitate to form. The mixture was filtered. The solid material was purified by silica gel column chromatography (5% 10:1 MeOH:NH₄OH in CH₂Cl₂), followed by trituration with 2:1 hexane:CH₂Cl₂, yielding the title compound as a tan solid: m.p. 206-211° C.; MS m/z 417.5 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.85 (1H, s), 8.62 (1H, s), 8.34 (1H, s), 7.90 (1H, d, J=8 Hz), 7.34 (1H, s), 7.31 (1H, dd, J=8 Hz, 1.5 Hz), 2.91 (2H, d, J=11Hz), 2.77 (3H, s), 2.73 (1H, m), 2.62 (1H, m), 2.38 (3H, s), 2.24 (2H, t, J=11Hz), 1.81 (2H, d, J=12 Hz), 1.67 (2H, qd, J=12 Hz, 3.5 Hz), 1.01 (6H, d, J=6.5 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 68 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 69 Preparation of Cpd 825

Step A: A mixture of 2-oxo-2H-chromen-7-yl trifluoromethanesulfonate (2.94 g, 10 mmol, prepared in Example 24, Step A), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (3.7 g, 12 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (0.81 g, 1.0 mmol) and K₂CO₃ (4.14 g, 30 mmol) in CH₃CN (40 mL) was stirred at 80° C. for 4 h. The mixture was partitioned in water and EtOAc. The organic layer was dried over Na₂SO₄, then concentrated and chromatographed on silica gel, eluting with 0-10% EtOAc in CH₂Cl₂ to give tert-butyl 4-(2-oxo-2H-chromen-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate (3.4 g, 100%). MS m/z 328.2 [M+H]⁺.

Step B: A solution of tert-butyl 4-(2-oxo-2H-chromen-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate (3.4 g, 10 mmol) in CH₂Cl₂ (50 mL) and EtOAc (100 mL) was stirred with 5% Pd/C (0.35 g) under H₂ (1 atm) at room temperature for 3 h. The mixture was filtered. The filtrate was concentrated to give tert-butyl 4-(2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (3.4 g, 100%). MS m/z 330.2 [M+H]⁺.

Step C: Bromine (2.1 g, 13 mmol) was added dropwise at room temperature into a solution of tert-butyl 4-(2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (3.4 g, 10 mmol) and sodium acetate (2.46 g, 30 mmol) in acetic acid (15 mL). After stirring 5 h at room temperature, the mixture was diluted with water and filtered. The solid was dissolved in dichloromethane and washed with an aqueous saturated NaHCO₃ solution. The organic layer was dried over Na₂SO₄, concentrated and chromatographed on silica gel, eluting with 0-10% EtOAc in CH₂Cl₂ to give tert-butyl 4-(3-bromo-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (0.9 g, 22%).

Step D: A mixture of tert-butyl 4-(3-bromo-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (0.5 g, 1.23 mmol), (2-methylimidazo[1,2-a]pyridin-6-yl)boronic acid (300 mg, 1.7 mmol, prepared in Example 34, Step A), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (136 mg, 0.166 mmol) and K₂CO₃ (2.5 mL of a 2.0 M aqueous solution, 5.0 mmol) in 1,4-dioxane (4 mL) was heated at 88° C. for 2 h. The mixture was partitioned in EtOAc and water. The organic layer was concentrated and chromatographed on silica gel, eluting with 20-100% EtOAc in CH₂Cl₂ to provide tert-butyl 4-(3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (0.4 g, 70%). MS m/z 460.4 [M+H]⁺.

Step E: A solution of tert-butyl 4-(3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (0.4 g, 0.87 mmol) in CH₂Cl₂ (2.0 mL) and TFA (2.0 mL) was stirred at room temperature for 15 min. The mixture was concentrated. The residue was partitioned in CH₂Cl₂ and aqueous K₂CO₃. The organic layer was concentrated, and then triturated with acetone to provide the title compound (0.25 g, 80%) as a gray powder. MS m/z 360.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.01 (1H, m), 8.37 (1H, s), 7.80 (1H, s), 7.71 (1H, d, J=7.9 Hz), 7.54 (2H, m), 7.31 (2H, m), 3.04 (2H, m), 2.74 (1H, m), 2.61 (2H, m), 2.34 (3H, d, J=0.6 Hz), 1.73 (2H, m), 1.57 (2H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 69 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 70 Preparation of Cpd 845

Step A: A mixture of 6-chloropyridazin-3-amine (2.6 g, 20 mmol) and 1-bromo-2,2-dimethoxypropane (4.0 g, 22 mmol) in CH₃CN (20 mL) was stirred at 100° C. overnight. The mixture was concentrated and chromatographed on silica gel, eluting with 20-50% EtOAc in CH₂Cl₂ to give 6-chloro-2-methylimidazo[1,2-b]pyridazine (0.53 g, 16%). MS m/z 168.1 [M+H]⁺.

Step B: Lithium bis(trimethylsilyl)amide (8.25 mL, 1 M in toluene, 8.25 mmol) was added to a mixture of 6-chloro-2-methylimidazo[1,2-b]pyridazine (0.46 g, 2.75 mmol), t-butyl acetate (0.55 mL, 4.12 mmol) and chloro[2-(di-tert-butylphosphino)-2′,4′,6′-triisopropyl-1,1′-biphenyl][2-(2-aminoethyl)phenyl)]palladium(II) (47 mg, 0.069 mmol). The mixture was stirred for 5 min at room temperature, and then washed with water. The organic layer was concentrated and chromatographed on silica gel, eluting with 0-35% EtOAc in CH₂Cl₂ to give tert-butyl 2-(2-methylimidazo[1,2-b]pyridazin-6-yl)acetate (0.12 g, 18%).

Step C: A mixture of 4-bromo-2-hydroxybenzaldehyde (0.12 g, 0.6 mmol), tert-butyl 2-(2-methylimidazo[1,2-b]pyridazin-6-yl)acetate (0.12 g, 0.49 mmol), piperidine (0.145 mL, 1.47 mmol) and acetic acid (42 μL, 0.74 mmol) in ethanol (3.0 mL) was stirred at 120° C. overnight. The mixture was diluted with water and filtered, affording 7-bromo-3-(2-methylimidazo[1,2-b]pyridazin-6-yl)-2H-chromen-2-one.

Step D: 7-Bromo-3-(2-methylimidazo[1,2-b]pyridazin-6-yl)-2H-chromen-2-one was mixed with tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (0.56 g, 0.6 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (40 mg, 0.049 mmol) and aqueous 2 M K₂CO₃ (1.0 mL, 2.0 mmol) in CH₃CN (2.0 mL). The mixture was stirred at 80° C. for 3 h, then diluted into EtOAc and washed with water. The organic layer was chromatographed on silica gel, eluting with 0-50% EtOAc in CH₂Cl₂ to give tert-butyl 4-(3-(3-(1-(tert-butoxycarbonyl)-1,2,3,6-tetrahydropyridin-4-yl)-2-methylimidazo[1,2-b]pyridazin-6-yl)-2-oxo-2H-chromen-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate (120 mg, 38%). MS m/z 640.6 [M+H]⁺.

Step E: The compound from Step D was dissolved in 4 N HCl in dioxane (2.0 mL). The mixture was stirred at room temperature for 15 min, then concentrated, treated with aqueous sodium bicarbonate, and filtered. The solid was washed with water and dried to afford the title compound (15 mg, 18%). MS m/z 440.5 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆) δ 9.26 (1H, s), 8.08 (1H, s), 8.02 (1H, m), 7.81 (1H, m), 7.54 (1H, m), 7.48 (1H, m), 6.70 (1H, m), 6.55 (1H, m), 3.45 (4H, m), 2.90 (4H, m), 2.39 (3H, s), 2.36-2.18 (4H, m).

Example 71 Preparation of Cpd 948

Step A: A mixture of 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-iodo-2H-chromen-2-one (0.21 g, 0.5 mmol, prepared according to Example 48, Step A), (R)-tert-butyl 2-(hydroxymethyl)pyrrolidine-1-carboxylate (0.145 g, 0.72 mmol), CuI (9.5 mg, 0.05 mmol), 3,4,7,8-tetramethyl-1,10-phenanthroline (24 mg, 0.1 mmol) and Cs₂CO₃ (0.33 g, 1.0 mmol) in toluene (1.5 mL) and dioxane (1.0 mL) was stirred at 110° C. for 16 h. The mixture was concentrated and chromatographed on silica gel, eluting with 0-10% MeOH in CH₂Cl₂ to give a crude mixture containing (R)-tert-butyl 2-(((3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)oxy)methyl)pyrrolidine-1-carboxylate (0.21 g). MS m/z 491.2 [M+H]⁺.

Step B: The mixture from Step A was treated with 4 N HCl in dioxane (2.0 mL). After 1 h, the mixture was concentrated, then dissolved in methanol (7N in NH₃). The solvent was removed and the residue was chromatographed on silica gel, eluting with 0-15% MeOH in CH₂Cl₂ to give the title compound (25 mg, 13%) as a light yellow powder: m.p. 172-174° C.; MS m/z 391.3 [M+H]⁺; ¹H NMR (500 MHz, CD₃OD) δ 8.71 (1H, s), 8.46 (1H, s), 8.04 (1H, d, J=0.9 Hz), 7.61 (1H, d, J=8.8 Hz), 6.98 (1H, m), 6.90 (1H, d, J=2.2 Hz), 4.08 (1H, m), 3.99 (1H, m), 3.55 (1H, m), 2.98 (2H, m), 2.83 (3H, s), 2.42 (3H, d, J=0.9 Hz), 2.02 (1H, m), 1.96-1.76 (2H), 1.64 (1H, m).

Example 72 Preparation of Cpd 958

Step A: Into a solution of 2-(4-bromo-2-(methoxymethoxy)phenyl)-1,3-dioxolane (1.45 g, 5.0 mmol) in THF (20 mL) at −78° C. was added BuLi (3.75 mL of a 1.6 M solution in hexane, 6.0 mmol). The mixture was stirred at −78° C. for 30 min, then benzyl 4-oxopiperidine-1-carboxylate (1.75 g, 7.5 mmol) was added to the mixture in one portion. The temperature of the mixture was allowed to rise to room temperature slowly. The mixture was stirred at room temperature for 2 h, then the reaction was quenched with saturated NH₄Cl solution. The mixture was partitioned in EtOAc and water. The organic layer was washed with brine, dried over Na₂SO₄, then concentrated and chromatographed on silica gel, eluting with 0-65% EtOAc in CH₂Cl₂ to give benzyl 4-(4-(1,3-dioxolan-2-yl)-3-(methoxymethoxy)phenyl)-4-hydroxypiperidine-1-carboxylate (1.2 g, 54%).

Step B: Into a solution of benzyl 4-(4-(1,3-dioxolan-2-yl)-3-(methoxymethoxy)phenyl)-4-hydroxypiperidine-1-carboxylate (1.2 g, 2.7 mmol) in CH₂Cl₂ (6.0 mL) at −78° C. was added diethylaminosulfur trifluoride (0.49 mL, 3.0 mmol) dropwise. The temperature of the mixture was allowed to rise to room temperature. The mixture was stirred at room temperature for an additional hour before it was quenched by with saturated Na₂CO₃ solution. The organic layer was concentrated and chromatographed on silica gel, eluting with 0-20% EtOAc in CH₂Cl₂ to give benzyl 4-fluoro-4-(4-formyl-3-(methoxymethoxy)phenyl)piperidine-1-carboxylate (0.83 g, 76%). ¹H NMR (500 MHz, acetone-d₆) δ 10.47 (1H, d, J=0.6 Hz), 7.78 (1H, dd, J=8.2, 0.6 Hz), 7.30-7.44 (6H, m), 7.18-7.22 (1H, m), 5.43 (2H, s), 5.15 (2H, s), 4.20 (2H, m), 3.52 (3H, s), 3.33-3.02 (2H, m), 2.22-2.06 (2H, m), 1.95 (2H, m).

Step C: Into a mixture of benzyl 4-fluoro-4-(4-formyl-3-(methoxymethoxy)phenyl)piperidine-1-carboxylate (0.83 g, 2.1 mmol) in ethanol (2.0 mL) and water (2.0 mL) was added concentrated HCl (12 N, 2.0 mL, 24 mmol). The mixture was stirred at 50° C. for 3 h. The mixture was partitioned in EtOAc and water. The organic layer was washed with brine, dried over Na₂SO₄, and concentrated to give benzyl 4-fluoro-4-(4-formyl-3-hydroxyphenyl)piperidine-1-carboxylate as a pure product (0.75 g, 100%). MS m/z 356.2 [M−H]⁻.

Step D: A mixture of benzyl 4-fluoro-4-(4-formyl-3-hydroxyphenyl)piperidine-1-carboxylate (0.75 g, 2.1 mmol), ethyl 2-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)acetate (0.54 g, 2.3 mmol), piperidine (1.5 μL, 0.042 mmol), acetic acid (0.5 mL) in ethanol (2.0 mL) was stirred at 120° C. for 2 h. The mixture was concentrated and chromatographed on silica gel, eluting with 30-100% EtOAc in CH₂Cl₂ to give benzyl 4-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)-4-fluoropiperidine-1-carboxylate (0.35 g, 47%). MS m/z 527.3 [M+H]⁺.

Step E: A mixture of benzyl 4-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)-4-fluoropiperidine-1-carboxylate (0.17 g, 0.32 mmol) and 10% Pd/C (17 mg) in methanol and dichloromethane (3:1, 10 mL) was stirred overnight under H₂ (1 atm). The mixture was filtered through Celite, concentrated and chromatographed on silica gel, eluting with 10% MeOH in CH₂Cl₂ to give 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-fluoropiperidin-4-yl)-2H-chromen-2-one (75 mg, 60%). MS m/z 393.3 [M+H]⁺.

Step F: 3-(6,8-Dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-fluoropiperidin-4-yl)-2H-chromen-2-one (75 mg, 60%) was dissolved in CH₃OH:CH₂Cl₂ 10:1 (2.0 mL). Acetaldehyde (0.1 mL of a 6.5 M solution in isopropanol, 0.65 mmol) was added to the solution, followed by solid sodium triacetoxyborohydride (85 mg, 0.4 mmol). The mixture was stirred at room temperature for 30 min, then quenched with aqueous K₂CO₃. The organic layer was concentrated and chromatographed on silica gel, eluting with 0-10% MeOH in CH₂Cl₂ to give the title compound (34 mg, 40%) as a gray solid: m.p. 162-164° C.; MS m/z 421.3 [M+H]⁺; ¹H NMR (500 MHz, CD₃OD) δ 8.79 (1H, s), 8.53 (1H, s), 8.09 (1H, d, J=0.6 Hz), 7.76 (1H, m), 7.42 (2H, m), 3.03 (2H, m), 2.84 (3H, s), 2.63 (2H, d, J=7.3 Hz), 2.54 (2H, br s), 2.43 (3H, d, J=0.9 Hz), 2.23 (2H, m), 2.05 (2H, br s), 1.20 (3H, t, J=7.3 Hz).

Example 73 Preparation of Cpd 853 Part 1, Preparation of 4,6-dimethyl-2-(trimethylstannyl)pyrazolo[1,5-a]pyrazine

Step A: Into a stirred solution of 1H-pyrazole (6.95 g, 0.1 mmol) and sodium hydroxide (16 g, 0.4 mol) in water (400 mL0 was added bromine (48 g, 0.3 mol) dropwise over 1 h. The mixture was stirred for 1 h, and then filtered. The cake was washed with water and dried to give 3,4,5-tribromo-1H-pyrazole (25.2 g, 81%). MS m/z 302.9 [M+H]⁺.

Step B: Into a mixture of 3,4,5-tribromo-1H-pyrazole (1.54 g, 5.1 mmol) and K₂CO₃ (2.1 g, 15.3 mmol) in acetone (20 mL) was added chloroacetone (0.52 g, 5.6 mmol) dropwise. The mixture was stirred at room temperature for 2 h, then partitioned between water and CH₂Cl₂. The organic layer was dried over Na₂SO₄ and concentrated to give 1-(3,4,5-tribromo-1H-pyrazol-1-yl)propan-2-one (1.80 g, 99%). MS m/z 361.0 [M+H]⁺.

Step C: A mixture of 1-(3,4,5-tribromo-1H-pyrazol-1-yl)propan-2-one (3.6 g, 10.0 mmol), tributyl(1-ethoxyvinyl)stannane (3.5 mL, 10.0 mmol) and bis(triphenylphosphine)palladium(II) dichloride (0.35 g, 0.5 mmol) in 1,4-dioxane (25 mL) was stirred at 100° C. overnight. The reaction was cooled to room temperature, and then filtered through Celite. The filtrate was concentrated and partitioned between THF (100 mL) and aqueous 1 N HCl (100 mL). The mixture was stirred at 60° C. for 1 h. The organic layer was separated. The aqueous layer was extracted with ethyl acetate (50 mL×3). The combined organic layers were dried over Na₂SO₄ and concentrated. The residue was chromatographed on silica gel, eluting with CH₂Cl₂ to give 1-(5-acetyl-3,4-dibromo-1H-pyrazol-1-yl)propan-2-one (1.1 g, 34%). MS m/z 325.0 [M+H]⁺.

Step D: A mixture of 1-(5-acetyl-3,4-dibromo-1H-pyrazol-1-yl)propan-2-one (3.24 g, 10 mmol) and ammonium acetate (7.7 g, 100 mmol) in acetic acid (10 mL) was stirred at 120° C. for 30 min. The mixture was cooled to room temperature and diluted with water (150 mL). The mixture was stirred for 20 min and filtered. The solid was dried and chromatographed on silica gel, eluting with CH₂Cl₂ to give 2,3-dibromo-4,6-dimethylpyrazolo[1,5-a]pyrazine (1.55 g, 50%). MS m/z 305.9 [M+H]⁺.

Step E: Into a solution of 2,3-dibromo-4,6-dimethylpyrazolo[1,5-a]pyrazine (1.55 g, 5.1 mmol) in THF (50 mL) at 0° C. was added a solution of i-PrMgCl (2.7 mL of a 2.0 M solution in THF, 5.4 mmol). The mixture was stirred at 0° C. for 30 min and excess reagent was quenched with the addition of methanol (25 mL). The mixture was partitioned between EtOAc and water. The organic layer was washed with brine, dried over Na₂SO₄, concentrated and chromatographed on silica gel, eluting with 0-35% EtOAc in hexanes to provide 2-bromo-4,6-dimethylpyrazolo[1,5-a]pyrazine (0.95 g, 80%). MS m/z 228.1 [M+H]⁺.

Step F: A mixture of 2-bromo-4,6-dimethylpyrazolo[1,5-a]pyrazine (0.226 mg, 1.0 mmol), hexamethyldistannane (0.397 g, 1.2 mmol) and tetrakis(triphenylphosphine) palladium(0) (0.116 g, 0.1 mmol) in toluene (3.0 mL) was stirred at 100° C. overnight under Argon. The mixture was cooled to room temperature and chromatographed on silica gel, eluting with 0-45% EtOAc in hexanes to give 4,6-dimethyl-2-(trimethylstannyl)pyrazolo[1,5-a]pyrazine (0.212 g, 70%) as a white solid. MS m/z 312.2 [M+H]⁺; ¹H NMR (500 MHz, acetone-d₆) δ 8.29 (1H, s), 6.95 (1H, s), 2.66 (3H, s), 2.42 (3H, d, J=0.9 Hz), 0.36 (9H, s).

Part 2: Preparation of 3-(4,6-dimethylpyrazolo[1,5-a]pyrazin-2-yl)-7-(1-ethylpiperidin-4-yl)-2H-chromen-2-one

Step A: A mixture of tert-butyl 4-(3-bromo-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (110 mg, 0.24 mmol, prepared in Example 69, Step C), 4,6-dimethyl-2-(trimethylstannyl)pyrazolo[1,5-a]pyrazine (75 mg, 0.24 mmol), tetrakis(triphenylphosphine) palladium(0) (28 mg, 0.024 mmol) in a 0.5 M solution of LiCl in THF (1.44 mL, 0.72 mmol) was stirred at 100° C. for 20 h, then the solvent was removed. The residue was chromatographed on silica gel, eluting with 0-60% EtOAc in CH₂Cl₂ to give tert-butyl 4-(3-(4,6-dimethylpyrazolo[1,5-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (98 mg, 86%). MS m/z 475.3 [M+H]⁺.

Step B: Following the procedure in Example 69, Step E, tert-butyl 4-(3-(4,6-dimethylpyrazolo[1,5-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)piperidine-1-carboxylate (98 mg, 0.21 mmol) and TFA (0.4 mL) in dichloromethane (0.4 mL) provided 3-(4,6-dimethylpyrazolo[1,5-a]pyrazin-2-yl)-7-(piperidin-4-yl)-2H-chromen-2-one (80 mg, 100%). MS m/z 375.3 [M+H]⁺.

Step C: Following the procedure in Example 67, 3-(4,6-dimethylpyrazolo[1,5-a]pyrazin-2-yl)-7-(piperidin-4-yl)-2H-chromen-2-one (61 mg, 0.1 mmol), acetaldehyde (30 μL of a 6.5 M solution in isopropanol, 0.2 mmol) and NaBH (OAc)₃ (64 mg, 0.3 mmol) provided the title compound (36 mg, 90%) as a gray solid. MS m/z 403.3 [M+H]⁺; ¹H NMR (500 MHz, CD₃OD) δ 8.69 (1H, s), 8.23 (1H, s), 7.68 (1H, d, J=8.5 Hz), 7.61 (1H, s), 7.30 (2H, dd, J=3.8 Hz, 2.8 Hz), 3.41 (2H, br), 2.89 (3H, d, J=7.3 Hz), 2.75 (3H, s), 2.66 (2H, m), 2.48 (3H, s), 2.07 (2H, br), 1.95 (2H, m), 1.29 (3H, t, J=7.3 Hz).

Example 74 Preparation of Cpd 876

Step A: Following the procedure in Example 37, Step A, 2,4-dihydroxybenzaldehyde (1.4 g, 10 mmol), ethyl acetoacetate (1.28 mL, 10 mmol), piperidine (1.0 mL, 10 mmol) and acetic acid (3 mL, 50 mmol) in CH₃CN (20 mL) provided 3-acetyl-7-hydroxy-2H-chromen-2-one (1.77 g, 82%). MS m/z 203.1 [M−H]⁻.

Step B: Diisopropyl azodicarboxylate (2.0 mL, 10 mmol) was added dropwise into a mixture of 3-acetyl-7-hydroxy-2H-chromen-2-one (2.15 g, 10 mmol), tert-butyl 2-hydroxyethylcarbamate (1.9 mL, 12 mmol), triphenylphosphine (2.62 g, 10 mmol) and triethylamine (1.4 mL, 10 mmol) in THF (10 mL) at 0° C. The mixture warmed to room temperature and stirred 48 h. The mixture was filtered. The solid material was washed with ether and hexane to give tert-butyl 2-(3-acetyl-2-oxo-2H-chromen-7-yloxy)ethylcarbamate (1.81 g, 50%). MS m/z 348.2 [M+H]⁺.

Step C: Bromine (26 μL, 0.5 mmol) in CH₂Cl₂ (0.5 mL) was added to a mixture of tert-butyl 2-(3-acetyl-2-oxo-2H-chromen-7-yloxy)ethylcarbamate (183 mg, 0.5 mmol), CHCl₃ (3.0 mL) and EtOH (1.0 mL). The mixture was stirred at room temperature for 4 h, then the solvent was removed from the mixture. The residue was chromatographed on silica gel, eluting with 0-15% MeOH in CH₂Cl₂ to give tert-butyl 2-(3-(2-bromoacetyl)-2-oxo-2H-chromen-7-yloxy)ethylcarbamate (0.108 g, 50%). MS m/z 428.1 [M+H]⁺.

Step D: Following the procedure in Example 43, Step A, tert-butyl 2-(3-(2-bromoacetyl)-2-oxo-2H-chromen-7-yloxy)ethylcarbamate (108 mg, 0.25 mmol) and 3,5-dimethylpyrazin-2-amine (32 mg, 0.25 mmol) in CH₃CN (2.0 mL) provided tert-butyl 2-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yloxy)ethylcarbamate (88 mg, 80%). MS m/z 451.3 [M+H]⁺.

Step E: Following the procedure in Example 69, Step E, tert-butyl 2-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yloxy)ethylcarbamate (88 mg, 0.20 mmol) and TFA (0.3 mL) in CH₂Cl₂ (0.6 mL) provided 7-(2-aminoethoxy)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one (66 mg, 95%). MS m/z 351.2 [M+H]⁺.

Step F: Following the procedure in Example 67, 7-(2-aminoethoxy)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one (35 mg, 0.1 mmol), formaldehyde (37% aqueous, 0.1 mL) and NaBH(OAc)₃ (64 mg, 0.3 mmol) provided the title compound (25 mg, 67%) as a pale yellow solid: m.p. 251-253° C.; MS m/z 379.3 [M+H]⁺; ¹H NMR (500 MHz, CD₃OD) δ 8.79 (1H, s), 8.51 (1H, s), 8.09 (1H, m), 7.69 (1H, d, J=8.5 Hz), 7.05 (1H, m), 6.99 (1H, m), 4.30 (2H, s), 3.12 (2H, br s), 2.86 (3H, s), 2.59 (6H, s), 2.45 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 74 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 75 Preparation of Cpd 918

Step A: Into a mixture of 3-acetyl-7-hydroxy-2H-chromen-2-one (2.3 g, 10 mmol), ethylene glycol (1.7 mL, 30 mmol) and triphenylphosphine (2.88 g, 11 mmol) in THF (10 mL) was added triethylamine (1.53 mL, 11 mmol). The mixture was cooled to 0° C. Diisopropyl azodicarboxylate (2.2 mL, 11 mmol) was added dropwise to the mixture. The mixture was stirred at room temperature overnight, after which the solvent was removed. The residue was chromatographed on silica gel, eluting with 0-45% EtOAc in CH₂Cl₂. The resulting material was chromatographed on silica gel a second time, eluting with 10-100% EtOAc in hexanes to provide 3-acetyl-7-(2-hydroxyethoxy)-2H-chromen-2-one (0.50 g, 20%). MS m/z 249.1 [M+H]⁺.

Step B: Following the procedure of Example 74, Step C, 3-acetyl-7-(2-hydroxyethoxy)-2H-chromen-2-one (0.5 g, 2.0 mmol) and bromine (0.105 mL, 2.0 mmol) in CHCl₃ (18 mL) and EtOH (2.0 mL) provided 3-(2-bromoacetyl)-7-(2-hydroxyethoxy)-2H-chromen-2-one (0.26 g, 40%). MS m/z 329.0 [M+H]⁺.

Step C: Following the procedure in Example 43, Step A, 3-(2-bromoacetyl)-7-(2-hydroxyethoxy)-2H-chromen-2-one (0.26 g, 0.8 mmol) and 3,5-dimethylpyrazin-2-amine (0.10 g, 0.8 mmol) in CH₃CN (2.0 mL) provided 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(2-hydroxyethoxy)-2H-chromen-2-one (0.32 g, 88%). MS m/z 352.2 [M+H]⁺.

Step D: Methanesulfonyl chloride (0.065 mL, 0.81 mmol) in CH₂Cl₂ (1.5 mL) was added dropwise into a solution of 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(2-hydroxyethoxy)-2H-chromen-2-one (0.29 g, 0.66 mmol) and triethylamine (0.28 mL, 1.98 mmol) in CH₂Cl₂ (1.5 mL) at 0° C. The mixture was stirred at 0° C. for 20 min, and then at room temperature for 30 min, then the solvent was removed. The residue was triturated with methanol, and then filtered to give 2-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yloxy)ethyl methanesulfonate (0.18 g, 63%). MS m/z 430.2 [M+H]⁺.

Step E: A mixture of 2-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yloxy)ethyl methanesulfonate (61 mg, 0.14 mmol) and pyrrolidine (0.07 mL, 0.85 mmol) in DMF (0.3 mL) was stirred at 60° C. for 30 min. The mixture was chromatographed on silica gel, eluting with 0-10% MeOH in CH₂Cl₂ to give the title compound (25 mg, 40%) as a pale yellow solid: m.p. 201-203° C.; MS m/z 405.2 [M+H]⁺; ¹H NMR (500 MHz, CD₃OD) δ 8.83 (1H, m), 8.55 (1H, m), 8.11 (1H, m), 7.74 (1H, m), 7.07 (2H, m), 4.46 (2H, m), 3.75 (2H, m), 3.70 (2H, m), 3.23 (2H, m), 2.88 (3H, s), 2.46 (3H, s), 2.22 (2H, m), 2.08 (2H, m).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 75 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 76 Preparation of Cpd 818

Step A: Methyl 2-(triphenylphosphoranylidene)acetate (1.84 g, 5.5 mmol) was dissolved in CHCl₃ (10 mL) and cooled to 0° C. N-Bromosuccinimide (980 mg, 5.5 mmol) was added to the solution. The mixture warmed to room temperature and stirred 20 min. The mixture was concentrated. 4-Bromosalicaldehyde (1.0 g, 5.0 mmol) and diphenyl ether (10 mL) were added to the residue. The mixture was heated at 220° C. for 3 h. The mixture was loaded directly onto silica gel, eluting with 0-30% EtOAc in hexanes to afford 3,7-dibromo-2H-chromen-2-one (650 mg, 43%) as a white solid. ¹H NMR (500 MHz, DMSO-d₆): δ 8.62 (1H, s), 7.78 (1H, d, J=1.8 Hz), 7.65 (1H, d, J=8.3 Hz), 7.60 (1H, dd, J=8.3 Hz, 1.8 Hz).

Step B: 3,7-Dibromo-2H-chromen-2-one (200 mg, 0.66 mmol) was combined with t-Boc-piperazine (186 mg, 1.0 mmol) and triethylamine (0.18 mL, 1.3 mmol) in DMSO (1 mL). The mixture was heated at 100° C. for 30 min. The mixture was partitioned in CH₂Cl₂ (5 mL) and H₂O (5 mL). The organic layer was loaded directly onto silica gel, eluting with 0-50% EtOAc in hexanes to afford tert-butyl 4-(7-bromo-2-oxo-2H-chromen-3-yl)piperazine-1-carboxylate (80 mg, 30%) as a white solid. ¹H NMR (500 MHz, DMSO-d₆): δ 7.72 (1H, s), 7.52 (1H, d, J=8.4 Hz), 7.43 (1H, dd, J=8.4 Hz, 1.6 Hz), 7.31 (1H, d, J=1.6 Hz), 3.81 (4H, m), 3.55 (4H, m), 1.49 (9H, s).

Step C: tert-Butyl 4-(7-bromo-2-oxo-2H-chromen-3-yl)piperazine-1-carboxylate (80 mg, 0.2 mmol) was combined with (2-methylimidazo[1,2-a]pyridin-6-yl)boronic acid (70 mg, 0.4 mmol, prepared in Example 34, Step A) and tetrakis(triphenylphosphine)palladium(0) (23 mg, 0.02 mmol) in CH₃CN (1 mL). Aqueous K₂CO₃ (1 mL, 1 M) was added to the mixture. The mixture was heated under nitrogen at 80° C. for 16 h. The organic layer was removed, concentrated and chromatographed on silica gel, eluting with 0-8% MeOH in CH₂Cl₂ to afford tert-butyl 4-(7-(2-methylimidazo[1,2-a]pyridin-6-yl)-2-oxo-2H-chromen-3-yl)piperazine-1-carboxylate (57 mg, 62%) as a white powder.

Step D: tert-Butyl 4-(7-(2-methylimidazo[1,2-a]pyridin-6-yl)-2-oxo-2H-chromen-3-yl)piperazine-1-carboxylate (57 mg, 0.12 mmol) was dissolved in TFA (1 mL). The mixture was stirred for 15 min at room temperature, then the solvent was removed with a nitrogen stream. The residue was partitioned in CH₂Cl₂ and aqueous K₂CO₃. The organic layer was collected and concentrated to afford the title compound (24 mg, 50%) as a white powder: m.p. 174-178° C.; MS m/z 361.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.99 (1H, s), 8.07 (1H, s), 7.89 (1H, d, J=8.1Hz), 7.76 (1H, s), 7.74 (1H, d, J=8.4 Hz), 7.68 (1H, d, J=9.2 Hz), 7.59 (1H, d, J=9.4 Hz), 7.47 (1H, s), 3.67 (1H, br), 3.35 (4H, m), 2.81 (4H, m), 2.37 (3H, s).

Example 77 Preparation of Cpd 846

Step A: Following the procedure in Example 6, Step A, 3-(hydroxymethyl)phenol (1.24 g, 100 mmol), triethylamine (70 mL, 500 mmol), anhydrous magnesium chloride (19.0 g, 200 mmol) and paraformaldehyde (30 g, 1000 mmol) in CH₃CN (400 mL) afforded 2-hydroxy-4-(hydroxymethyl)benzaldehyde (4.5 g, 29%). MS m/z 151.1 [M−H]⁻.

Step B: 2-Hydroxy-4-(hydroxymethyl)benzaldehyde (3.04 g, 20 mmol) was combined with ethyl acetoacetate (2.55 mL, 20 mmol) and piperidine (0.2 mL, 2.0 mmol) in CH₃CN (10 mL). The mixture was heated at 80° C. for 1 h. The mixture was concentrated and chromatographed on silica gel, eluting with 0-50% EtOAc in hexanes to afford 3-acetyl-7-(hydroxymethyl)-2H-chromen-2-one (1.88 g, 43%) as a tan powder. ¹H NMR (500 MHz, DMSO-d₆): δ 8.66 (1H, s), 7.90 (1H, d, J=7.7 Hz), 7.36 (2H, m), 5.55 (1H, t, J=5.8 Hz), 4.65 (2H, d, J=5.8 Hz), 2.59 (3H, s).

Step C: 3-Acetyl-7-(hydroxymethyl)-2H-chromen-2-one (1.88 g, 8.3 mmol) was suspended in CHCl₃ (8 mL). Bromine (0.43 mL, 8.3 mmol) was added dropwise at room temperature, then the mixture was stirred at room temperature for 30 min. The solid material in the mixture was collected, washed with CHCl₃ and dried to afford 3-(2-bromoacetyl)-7-(hydroxymethyl)-2H-chromen-2-one (2.1 g, 85%) as a tan powder. MS m/z 297.1, 299.1 [M+H]⁺.

Step D: 3-(2-Bromoacetyl)-7-(hydroxymethyl)-2H-chromen-2-one (2.1 g, 7.0 mmol) was combined with 3,5-dimethylpyrazin-2-amine (940 mg, 7.7 mmol) in CH₃CN (10 mL). The mixture was heated at 80° C. for 16 h. The mixture was cooled to room temperature and filtered. The solid material was washed with CH₃CN and dried to afford 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(hydroxymethyl)-2H-chromen-2-one hydrobromide (1.0 g, 35%) as a tan powder. MS m/z 322.3 [M+H]⁺. ¹H NMR (500 MHz, DMSO-d₆): δ 8.91 (1H, s), 8.73 (1H, s), 8.45 (1H, s), 7.96 (1H, d, J=8.1Hz), 7.41 (1H, s), 7.37 (1H, d, J=8.1Hz), 4.65 (2H, s), 2.83 (3H, s), 2.42 (3H, s).

Step E: 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(hydroxymethyl)-2H-chromen-2-one hydrobromide (1.0 g, 2.5 mmol) was combined with diisopropylethylamine (1.3 mL, 7.5 mmol) in CH₂Cl₂ (10 mL). To the mixture was added methanesulfonyl chloride (0.39 mL, 5 mmol) at 0° C. The mixture was stirred 30 min at 0° C., then loaded directly onto silica gel, eluting with 0-30% EtOAc in CH₂Cl₂ to afford (3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)methyl methanesulfonate (900 mg, 90%) as a white powder. MS m/z 400.3 [M+H]⁺. ¹H NMR (500 MHz, DMSO-d₆): δ 8.90 (1H, s), 8.65 (1H, s), 8.36 (1H, s), 8.06 (1H, d, J=8.1Hz), 7.57 (1H, s), 7.48 (1H, d, J=8.1Hz), 5.41 (2H, s), 2.78 (3H, s), 2.39 (3H, s).

Step F: (3-(6,8-Dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)methyl methanesulfonate (60 mg, 0.15 mmol) was suspended in THF:DMF (1:1, 1 mL). Dimethylamine (0.75 mmol, 1 M in THF) was added to the mixture. The mixture was stirred at room temperature for 1 h, then loaded directly onto silica gel and eluted with 0-10% MeOH (3% NH₃) in CH₂Cl₂ to afford the title compound (31 mg, 59%) as an off-white powder: m.p. 192-196° C.; MS m/z 349.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.88 (1H, s), 8.64 (1H, s), 8.36 (1H, s), 7.95 (1H, d, J=8.1Hz), 7.38 (1H, s), 7.35 (1H, d, J=8.1Hz), 3.53 (2H, s), 2.78 (3H, s), 2.38 (3H, s), 2.20 (6H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 77 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 78 Preparation of Cpd 902

Step A: 7-Hydroxycoumarin (4.86 g, 30 mmol) was dissolved in DMF (60 mL). Sodium hydride (1.8 g, 45 mmol, 60% dispersion in mineral oil) was added to the solution. After 5 min of vigorous stirring, N,N-bis(trifluoromethylsulfonyl)aniline (11.8 g, 33 mmol) was added to the mixture. The mixture was stirred vigorously for 30 min at room temperature, then ice water (120 mL) was added. The mixture was allowed to stand for 30 min, then filtered to remove the solid product. The solid was washed with water and dried, affording 2-oxo-2H-chromen-7-yl trifluoromethanesulfonate (6.9 g, 78%) as a white crystalline solid. MS m/z 295.2 [M+H]⁺.

Step B: 2-Oxo-2H-chromen-7-yl trifluoromethanesulfonate (2.94 g, 10 mmol) was combined with 3-butyne-1-ol (1.13 mL, 15 mmol), copper(I) iodide (380 mg, 2.0 mmol), tetrakis(triphenylphosphine)palladium(0) (1.16 g, 1.0 mmol) and triethylamine (2.78 mL, 20 mmol) in DMF (30 mL). The mixture was stirred at 60° C. for 2 h, then the solvent was removed by rotary evaporation. The residue was chromatographed on silica gel, eluting with 0-20% EtOAc in CH₂Cl₂ to afford 7-(4-hydroxybut-1-yn-1-yl)-2H-chromen-2-one (2.1 g, quant.) as a tan powder. MS m/z 215.2 [M+H]⁺.

Step C: 7-(4-Hydroxybut-1-yn-1-yl)-2H-chromen-2-one (1.72 g, 8 mmol) was suspended in MeOH (20 mL) with 10% Pd/C (300 mg). The mixture was stirred vigorously under H₂ (1 atm) for 16 h, then the catalyst was removed by vacuum filtration. The filtrate was concentrated to afford 7-(4-hydroxybutyl)-2H-chromen-2-one (1.67 g, 96%) as a colorless oil. MS m/z 219.2 [M+H]⁺.

Step D: 7-(4-Hydroxybutyl)-2H-chromen-2-one (1.67 g, 7.6 mmol) was dissolved in AcOH (20 mL). Sodium acetate (1.87 g, 22.8 mmol) and bromine (1.18 mL, 22.8 mmol) were added sequentially. The mixture was stirred at 40° C. for 2 h., then the solvent was removed by rotary evaporation. MeOH (10 mL) and triethylamine (1 mL) were added to the residue and the mixture was stirred at 70° C. for 10 min. The solvent was removed by rotary evaporation, then the residue was partitioned in water and CH₂Cl₂. The organic layer was collected, concentrated and chromatographed on silica gel, eluting with 20-80% EtOAc in hexanes to afford 3-bromo-7-(4-hydroxybutyl)-2H-chromen-2-one (1.2 g, 53%) as a white powder. MS m/z 297.1, 299.1 [M+H]⁺.

Step E: 3-Bromo-7-(4-hydroxybutyl)-2H-chromen-2-one (1.2 g, 4 mmol) was combined with tributyl(1-ethoxyvinyl)stannane (1.8 g, 5 mmol), copper(I) iodide (190 mg, 1 mmol) and tetrakis(triphenylphosphine)palladium(0) (462 mg, 0.4 mmol) in 1,4-dioxane (20 mL). The mixture was stirred at 60° C. for 4 h, then the solvent was removed by rotary evaporation. The residue was chromatographed on silica gel, eluting with 20-50% EtOAc in hexanes to afford 3-(1-ethoxyvinyl)-7-(4-hydroxybutyl)-2H-chromen-2-one (860 mg, 75%) a colorless oil. MS m/z 261.2 [M+H]⁺ (hydrolysis during UPLC/MS analysis provides the mass of 3-acetyl-7-(4-hydroxybutyl)-2H-chromen-2-one).

Step F: 3-(1-Ethoxyvinyl)-7-(4-hydroxybutyl)-2H-chromen-2-one (860 mg, 3.0 mmol) was dissolved in THF (12 mL) and H₂O (3 mL). N-Bromosuccinimide (587 mg, 3.3 mmol) was added to the mixture. After 10 min, THF was removed with a nitrogen stream. The residue was suspended in H₂O (10 mL) and filtered. The collected solid was washed with H₂O and dried affording 3-(2-bromoacetyl)-7-(4-hydroxybutyl)-2H-chromen-2-one (1.0 g, 99%) as a tan solid. MS m/z 339.1, 341.1 [M+H]⁺.

Step G: Following the procedure in Example 77, Step D, 3-(2-bromoacetyl)-7-(4-hydroxybutyl)-2H-chromen-2-one (1.0 g, 3.0 mmol), 3,5-dimethylpyrazin-2-amine (403 mg, 3.3 mmol) in CH₃CN (10 mL) yielded 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-hydroxybutyl)-2H-chromen-2-one hydrobromide (880 mg, 66%) as a tan powder. MS m/z 364.2 [M+H]⁺.

Step H: Following the procedure in Example 77, Step E, 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-hydroxybutyl)-2H-chromen-2-one hydrobromide, diisopropylethylamine (1.3 mL, 7.5 mmol) and methanesulfonyl chloride (0.39 mL, 5 mmol) in CH₂Cl₂ (10 mL) yielded 4-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)butyl methanesulfonate (705 mg, 80%) as a pale yellow solid. MS m/z 442.2 [M+H]⁺.

Step I: Following the procedure in Example 77, Step F, 4-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)butyl methanesulfonate (36 mg, 0.08 mmol), dimethylamine (2 mmol, 2 M in THF) in DMF (1 mL) yielded the title compound (27 mg, 86%) as an off white powder: m.p. 190-193° C.; MS m/z 391.5 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.86 (1H, s), 8.62 (1H, s), 8.35 (1H, s), 7.90 (1H, d, J=7.9 Hz), 7.32 (1H, s), 7.27 (1H, d, J=7.9 Hz), 2.78 (3H, s), 2.73 (2H, t, J=6.9 Hz), 2.38 (3H, s), 2.22 (2H, t, J=6.9 Hz), 2.10 (6H, s), 1.64 (2H, p, J=7.5 Hz), 1.43 (2H, p, J=7.5 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 78 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 79 Preparation of Cpd 908

Step A: Following the procedure in Example 78, Step B, 2-oxo-2H-chromen-7-yl trifluoromethanesulfonate (4.2 g, 14.3 mmol, prepared in Example 78, Step A) propargyl alcohol (1.13 mL, 21.4 mmol), copper(I) iodide (266 mg, 1.4 mmol), tetrakis(triphenylphosphine) palladium(0) (1.62 g, 1.4 mmol) and triethylamine (2.98 mL, 21.5 mmol) in DMF (30 mL) yielded 7-(3-hydroxyprop-1-yn-1-yl)-2H-chromen-2-one (1.5 g, 52%) as a tan powder. MS m/z 201.1 [M+H]⁺.

Step B: Following the procedure in Example 78, Step C, 7-(3-hydroxyprop-1-yn-1-yl)-2H-chromen-2-one (1.5 g, 8 mmol), 10% Pd/C (200 mg) in MeOH (20 mL) yielded 7-(3-hydroxypropyl)-2H-chromen-2-one (1.5 g, quant.) as a white powder. MS m/z 205.2 [M+H]⁺.

Step C: Following the procedure in Example 78, Step D, 7-(3-hydroxypropyl)-2H-chromen-2-one (1.5 g, 7.3 mmol), sodium acetate (1.74 g, 21.2 mmol) and bromine (1.1 mL, 21.2 mmol) in AcOH (20 mL) yielded 3-bromo-7-(3-hydroxypropyl)-2H-chromen-2-one (595 mg, 29%) as a white powder. MS m/z 283.1, 285.1 [M+H]⁺.

Step D: 3-bromo-7-(3-hydroxypropyl)-2H-chromen-2-one (142 mg, 0.5 mmol) was combined with (2-methylimidazo[1,2-a]pyridin-6-yl)boronic acid (132 mg, 0.75 mmol, prepared in Example 34, Step A) and tetrakis(triphenylphosphine)palladium(0) (58 mg, 0.05 mmol) in CH₃CN (2 mL). Aqueous K₂CO₃ (2 mL, 1 M) was added to the mixture. The mixture was heated under nitrogen at 80° C. for 2 h. The organic layer was removed, concentrated and chromatographed on silica gel, eluting with 0-8% MeOH in CH₂Cl₂ to afford 7-(3-hydroxypropyl)-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one (65 mg, 39%) as a tan powder. MS m/z 335.2 [M+H]⁺.

Step F: Following the procedure in Example 77, Step E, 7-(3-hydroxypropyl)-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one (65 mg, 0.2 mmol), diisopropylethylamine (0.15 mL, 0.8 mmol) and methanesulfonyl chloride (30 μL, 0.4 mmol) in CH₂Cl₂ (2 mL) yielded 3-(3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2-oxo-2H-chromen-7-yl)propyl methanesulfonate (35 mg, 47%) as a tan powder. MS m/z 413.3 [M+H]⁺.

Step G: Following the procedure in Example 77, Step F, 3-(3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2-oxo-2H-chromen-7-yl)propyl methanesulfonate (35 mg, 0.08 mmol), dimethylamine (2 mmol, 2 M in THF) in THF (1 mL) yielded the title compound (22 mg, 76%) as an off white powder: m.p. 176-178° C.; MS m/z 362.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 9.01 (1H, s), 8.38 (1H, s), 7.80 (1H, s), 7.70 (1H, d, J=7.9 Hz), 7.54 (2H, m), 7.34 (1H, s), 7.28 (1H, d, J=7.9 Hz), 2.73 (2H, t, J=7.1Hz), 2.36 (3H, s), 2.22 (2H, t, J=7.1Hz), 2.13 (6H, s), 1.76 (2H, p, J=7.3 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 79 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 80 Preparation of Cpd 927

3-(3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl)propyl methanesulfonate (300 mg, 0.70 mmol, prepared according to Example 77) was combined with sodium azide (57 mg, 0.88 mmol) in DMF (5 mL). The mixture was heated at 70° C. for 2 h. Triphenylphosphine (367 mg, 1.4 mmol) and H₂O (63 μL, 3.5 mmol) were added to the solution. The mixture was stirred for an additional 1 h at 70° C., then loaded directly onto silica gel, eluting with 9.7:0.3:90 MeOH:NH₃:CH₂Cl₂ to afford the title compound (160 mg, 66%) as an off white powder: m.p. 212-216° C.; MS m/z 349.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.83 (1H, s), 8.60 (1H, s), 8.33 (1H, s), 7.88 (1H, d, J=7.9 Hz), 7.32 (1H, s), 7.26 (1H, d, J=7.9 Hz), 2.77 (3H, s), 2.75 (2H, t, J=6.9 Hz), 2.57 (2H, t, J=6.9 Hz), 2.37 (3H, s), 1.70 (2H, p, J=7.5 Hz).

Example 81 Preparation of Cpd 933

7-(3-aminopropyl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one (40 mg, 0.11 mmol, prepared in Example 80) was suspended in 1,2-dichloroethane (1 mL) and EtOH (0.5 mL). To the mixture was added benzaldehyde (122 μL, 1.2 mmol) and sodium triacetoxyborohydride (47 mg, 0.22 mmol). The mixture was stirred at room temperature for 16 h, then loaded directly onto silica gel, eluting with 2-8% MeOH (3% NH₃) in CH₂Cl₂ to afford the title compound (28 mg, 65%) as a tan powder: m.p. 143-147° C.; MS m/z 439.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.85 (1H, s), 8.62 (1H, s), 8.35 (1H, s), 7.88 (1H, d, J=7.9 Hz), 7.34-7.19 (7H), 3.69 (2H, s), 2.78 (3H, s), 2.75 (2H, m), 2.52 (2H, m), 2.38 (3H, s), 1.79 (2H, p, J=6.7 Hz).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 81 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 82 Preparation of Cpd 943

A mixture of 7-bromo-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one (74.4 mg, 0.2 mmol, prepared in Example 48, Step A), 3-(dimethylamino)azetidine dihydrochloride (69.2 mg, 0.4 mmol), bis(dibenzylideneacetone)palladium(0) (11.5 mg, 0.02 mmol), RuPhos (9.3 mg, 0.02 mmol), BrettPhos (10.7 mg, 0.02 mmol) and Cs₂CO₃ (228.1 mg, 0.7 mmol) in toluene (0.2 mL) and t-butanol (0.2 mL) was heated at 100° C. for 5 h. The solvent was removed by rotary evaporation, then the residue was suspended in diethyl ether and filtered. The solid was washed thoroughly with water and dried to afford the title compound (59.5 mg, 76%) as a yellow solid: m.p. 246-250° C.; MS m/z 390.3 [M+H]⁺; ¹H NMR (500 MHz, DMSO-d₆): δ 8.72 (1H, s), 8.50 (1H, s), 8.32 (1H, s), 7.74 (1H, d, J=8.6 Hz), 6.47 (1H, dd, J=8.6 Hz, 2.2 Hz), 6.35 (1H, d, J=1.9 Hz), 4.05 (2H, m), 3.78 (2H, m), 3.27 (1H, m), 2.75 (3H, s), 2.37 (3H, s), 2.15 (6H, s).

Example 83 Preparation of Cpd 971

Step A: 6-[3-(6,8-Dimethyl-imidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl]-2,6-diaza-spiro[3.3]heptane-2-carboxylic acid tert-butyl ester (49 mg, 0.100 mmol, prepared according to Example 43) was stirred in CH₂Cl₂ (5 mL) with trifluoroacetic acid (1.25 mL) at room temperature for 2 h, then the solvent was removed in vacuo. The residue was partitioned in CH₂Cl₂/MeOH (9/1) and an aqueous saturated NaHCO₃ solution (1 M, 5 mL). The organic phase was dried over Na₂SO₄ and purified by silica gel chromatography (CH₂Cl₂/MeOH 95/5, 1% aq. NH₃) to give the title compound (33 mg, 85%) as a yellow solid. MS m/z 388.3 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 8.91 (1H, d, J=1.2 Hz), 8.30 (1H, s), 7.91 (1H, d), 7.53 (1H, d), 7.48 (1H, d), 6.48 (1H, dd), 6.40 (1H, d), 4.14 (4H, s), 4.06 (4H, s), 2.36 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 83 by substituting the appropriate starting materials, reagents and reaction conditions.

Example 84 Preparation of Cpd 985

Step A: 3-fluoropyridin-2-amine (5.0 g, 45 mmol) was combined with N-bromosuccinimide (8.0 g, 45 mmol) in CH₃CN. The mixture was stirred at room temperature for 30 min. Chloroacetone (4.3 mL, 54 mmol) was added to the mixture, which was heated at 100° C., allowing CH₃CN to evaporate. After 1 h, the temperature was further raised to 120° C. for 2 h. The mixture solidified upon cooling. The solid material was dissolved in H₂O (50 mL) and an aqueous saturated NaHCO₃ solution (100 mL) was added. A precipitate formed, and was collected by vacuum filtration. The solid material was washed with H₂O and vacuum dried. The material was chromatographed on silica gel (0-30% EtOAc in CH₂Cl₂), providing the title compound as a tan powder (4.65 g, 45%). MS m/z 229.2 [M+H]⁺.

Step B: A mixture of 6-bromo-8-fluoro-2-methyl-imidazo[1,2-a]pyridine (500 mg, 2.18 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(1,3,2-dioxaborolane) (665 mg, 2.62 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloro-palladium(II) complex with dichloromethane (89.1 mg, 0.109 mmol), and potassium acetate (643 mg, 6.55 mmol) in 1,4-dioxane (4.4 mL) was stirred at 80° C. overnight under Argon. The mixture was diluted with THF (12 mL) and filtered. The filtrate was concentrated to give a dark solid residue, which was used without further purification. The residue was combined with 3-bromo-7-fluoro-2H-chromen-2-one (250 mg, 1.03 mmol, prepared in Example 32, step A), [1,1′-bis(diphenylphosphino)-ferrocene]dichloropalladium(II) complex with dichloromethane (84 mg, 0.101 mmol) and aqueous K₂CO₃ (2.0 M×1.55 mL, 3.09 mmol) in CH₃CN (3.5 mL). The mixture was stirred at 60° C. for 5 h under Argon, then cooled to room temperature, diluted with water and filtered. The solid was dissolved in CH₂Cl₂ (10% methanol), dried over Na₂SO₄, filtered, concentrated and purified by silica gel chromatography (0-5% MeOH in CH₂Cl₂) to give 7-fluoro-3-(8-fluoro-2-methyl-imidazo[1,2-a]pyridin-6-yl)-chromen-2-one (286 mg, 89%) as a brown solid.

Step C: A mixture of 7-fluoro-3-(8-fluoro-2-methyl-imidazo[1,2-a]pyridin-6-yl)-chromen-2-one (87 mg, 0.279 mmol), triethyl amine (0.14 mL, 1.00 mmol) and tert-butyl 2,6-diazaspiro[3.3]heptane-2-carboxylate hemioxalate (158 mg, 0.325 mmol) in DMSO (1 mL) was stirred at 100° C. for 20 h. The mixture was diluted with an aqueous saturated NaHCO₃ solution and filtered. The solid was dried and purified by silica gel chromatography (0-10% MeOH in CH₂Cl₂) to give 6-[3-(8-Fluoro-2-methyl-imidazo[1,2-a]pyridin-6-yl)-2-oxo-2H-chromen-7-yl]-2,6-diazaspiro[3.3]heptane-2-carboxylic acid tert-butyl ester as a yellow solid.

Step D: 6-[3-(8-Fluoro-2-methyl-imidazo[1,2-a]pyridin-6-yl)-2-oxo-2H-chromen-7-yl]-2,6-diazaspiro [3.3]heptane-2-carboxylic acid tert-butyl ester (136 mg, 0.27 mmol) was stirred in CH₂Cl₂ (3 mL) with trifluoroacetic acid (0.5 mL) at room temperature for 2 h, then the solvent was removed in vacuo. The residue was partitioned in CH₂Cl₂/MeOH (9/1) and an aqueous NaHCO₃ solution (1 M, 5 mL). The organic phase was dried over Na₂SO₄, concentrated and purified by silica gel chromatography (CH₂Cl₂/MeOH 80/20, 1% aq. NH₃) to give the title product (32 mg, 29%) as a yellow solid. MS m/z 391.7 [M+H]⁺. ¹H NMR (300 MHz, CDCl₃): δ 8.71 (1H, s), 8.42 (1H, s), 7.75 (1H, s), 7.45 (1H, d, J=8.7 Hz), 6.36 (1H, dd, J=8.7 Hz, J=2.1Hz), 6.28 (1H, d, J=2.1Hz), 4.10 (4H, s), 3.48 (4H, s), 2.90 (3H, s), 2.17 (3H, s).

As shown in Table 1 below, additional compounds disclosed herein may be prepared according to Example 84 by substituting the appropriate starting materials, reagents and reaction conditions.

Table 1 provides isolated compounds of a free base form of a compound of Formula (I) that may be prepared according to the procedures of the indicated Example by substituting the appropriate starting materials, reagents and reaction conditions. The preparation of any salt, isotopologue, stereoisomer, racemate, enantiomer, diastereomer or tautomer from a free base form of a compound of Formula (I) is also contemplated and further included within the scope of the description herein. Where a free base form of the compound was not isolated from the salt form, a person of ordinary skill in the art could be expected to perform the required reactions to prepare and isolate the free base form of the compound.

The term “Cpd” represents Compound number, the term “Ex” represents “Example Number” (wherein * indicates that the corresponding Example for the Compound is provided above), the term “M.P.” represents “Melting Point (° C.),” the term “MS” represents “Mass Spectroscopy Peak(s) m/z [M+H]^(+/−)”, the term “D” represents “Decomposition/Decomposed,” the term “DR” represents “Decomposition Range,” the term “S” represents “Softens,” the term “ND” indicates that the value was “Not Determined” and the term “NI” indicates that the compound was “Not Isolated.”

TABLE 1 Ex Cpd Name M.P. MS  1  1b 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-benzoxazol-2- ND 416.3 yl]-2H-chromen-2-one  1  2b 7-(piperazin-1-yl)-3-[7-(trifluoromethyl)-1,3-benzoxazol- ND 416.2 2-yl]-2H-chromen-2-one  5  3a 2-oxo-N-phenyl-7-(piperazin-1-yl)-2H-chromene-3- 238-248 350.1 carboxamide  1  4a 3-(1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H-chromen- NI NI 2-one  2  5a 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one  2  6a 3-(7-chloro-1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one  9  7 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperazin-1- 222-226 412.1 ylmethyl)-2H-chromen-2-one  9  8 3-(1,3-benzothiazol-2-yl)-7-[(propan-2-ylamino)methyl]- 164-168 351.2 2H-chromen-2-one  9  9 7-[(propan-2-ylamino)methyl]-3-[4-(trifluoromethyl)-1,3- 191-196 419.2 benzothiazol-2-yl]-2H-chromen-2-one  9  10 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(propan-2- 157-161 385 ylamino)methyl]-2H-chromen-2-one 26  11 7-(4-methylpiperazin-1-yl)-3-[3-(trifluoromethyl)phenyl]- 150-156 389.3 2H-chromen-2-one 26  12 7-(piperazin-1-yl)-3-(pyridin-3-yl)-2H-chromen-2-one 170-172 308.3  9  13 3-(1,3-benzothiazol-2-yl)-7-[(dimethylamino)methyl]-2H- 171-176 337.1 chromen-2-one  9*  14 3-(4-chloro-1,3-benzothiazol-2-yl)-7- 179-182 371.1 [(dimethylamino)methyl]-2H-chromen-2-one 68  15 3-(1,3-benzothiazol-2-yl)-7-[4-(propan-2-yl)piperazin-1- 238-246 406.4 yl]-2H-chromen-2-one  1  16 3-(1,3-benzothiazol-2-yl)-7-(4-methylpiperazin-1-yl)-2H- 259-262 378.1 chromen-2-one  2  17 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(4-methylpiperazin-1- 256-260 412.1 yl)-2H-chromen-2-one 11  18a 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperidin-4-yl)-2H- NI NI chromen-2-one  1  19a 3-(5-fluoro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one 66*  20 3-(1,3-benzoxazol-2-yl)-7-(piperidin-4-yloxy)-2H- 198-201 363.2 chromen-2-one  1  21 3-(4-methyl-1,3-benzoxazol-2-yl)-7-(4-methylpiperazin-1- 217-219 376.2 yl)-2H-chromen-2-one  1  22a 3-(4-methyl-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one  1  23 3-(1,3-benzoxazol-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin- 230-232 376.3 1-yl]-2H-chromen-2-one  1  24 3-(1,3-benzothiazol-2-yl)-7-[(3R,5S)-3,5- 248-252 392.1 dimethylpiperazin-1-yl]-2H-chromen-2-one  2  25 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(3R,5S)-3,5- 229-235 426.0 dimethylpiperazin-1-yl]-2H-chromen-2-one 428.0 26  26 3-(3-fluorophenyl)-7-(piperazin-1-yl)-2H-chromen-2-one 148-150 325.3 26  27 7-(piperazin-1-yl)-3-(pyridin-4-yl)-2H-chromen-2-one 212-214 308.4 12*  28 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(4-methylpiperazin- 230-235 440.1 1-yl)carbonyl]-2H-chromen-2-one 17*  29 7-(piperazin-1-yl)-3-(1H-pyrazol-5-yl)-2H-chromen-2-one 224-228 297.2  5  30 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2-oxo-N-phenyl- 231-233 378.3 2H-chromene-3-carboxamide  1  31 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(4-methyl-1,3- 243-245 390.3 benzoxazol-2-yl)-2H-chromen-2-one 24*  32 7-(piperazin-1-yl)-3-(pyridin-2-ylamino)-2H-chromen-2- 191-194 323.2 one 24  33 7-(piperazin-1-yl)-3-(pyrimidin-2-ylamino)-2H-chromen- 193-195 324.2 2-one 36  34 3-(imidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H- 290 (D) 347.2 chromen-2-one 13*  35 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[2-(propan-2- 179-182 399.1 ylamino)ethyl]-2H-chromen-2-one 13  36 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[3-(propan-2- 262-265 413.1 ylamino)propyl]-2H-chromen-2-one 21  37 3-(4-methyl-1,3-thiazol-2-yl)-7-(piperazin-1-yl)-2H- 244-249 328.1 chromen-2-one 18*  38 3-(1-methyl-1H-pyrazol-3-yl)-7-(piperazin-1-yl)-2H- 224-228 311.1 chromen-2-one  1  39 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(4-fluoro-1,3- 242-243 394.2 benzoxazol-2-yl)-2H-chromen-2-one  1  40a 3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one 14  41 3-(1,3-benzothiazol-2-yl)-2-oxo-2H-chromen-7-yl 221-225 408.1 piperazine-1-carboxylate 14*  42 3-(4-chloro-1,3-benzothiazol-2-yl)-2-oxo-2H-chromen-7-yl 236-239 442.1 piperazine-1-carboxylate  1  43 benzyl 4-[3-(1-methyl-1H-benzimidazol-2-yl)-2-oxo-2H- 253-254 495.1 chromen-7-yl]piperazine-1-carboxylate 36  44 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 190-193 361.2 2H-chromen-2-one 21  45 7-(4-methylpiperazin-1-yl)-3-(4-phenyl-1,3-thiazol-2-yl)- 205-210 404.2 2H-chromen-2-one 66  46 3-(1,3-benzothiazol-2-yl)-7-(piperidin-4-yloxy)-2H- 220-226 379.1 chromen-2-one  4  47 3-(1,3-benzoxazol-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)- 170-173 376.2 2H-chromen-2-one  4  48 3-(1,3-benzoxazol-2-yl)-7-[3-(dimethylamino)pyrrolidin-1- 222-224 376.2 yl]-2H-chromen-2-one  4  49 3-(1,3-benzoxazol-2-yl)-7-{[2- ND 364.2 (dimethylamino)ethyl](methyl)amino}-2H-chromen-2-one 16*  50 3-(5-phenyl-1,2,4-oxadiazol-3-yl)-7-(piperazin-1-yl)-2H- 214-221 375.2 chromen-2-one 36  51 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 229-232 361.2 2H-chromen-2-one 21  52b 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]- 221-229 382.2 2H-chromen-2-one 21  53a 7-(4-methylpiperazin-1-yl)-3-[4-(trifluoromethyl)-1,3- NI NI thiazol-2-yl]-2H-chromen-2-one 66  54 3-(1,3-benzothiazol-2-yl)-7-[(3S)-pyrrolidin-3-yloxy]-2H- 205-211 365.2 chromen-2-one 66  55 3-(1,3-benzothiazol-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H- 205-211 365.2 chromen-2-one 66  56 3-(1,3-benzothiazol-2-yl)-7-[(2S)-pyrrolidin-2-ylmethoxy]- 195-199 379.2 2H-chromen-2-one  9  57 3-(1,3-benzothiazol-2-yl)-7-[(diethylamino)methyl]-2H- 116-119 365.2 chromen-2-one  9  58 3-(4-chloro-1,3-benzothiazol-2-yl)-7- 147-151 399.2 [(diethylamino)methyl]-2H-chromen-2-one  9  59 3-(1,3-benzothiazol-2-yl)-7-(piperidin-1-ylmethyl)-2H- 201-205 377.2 chromen-2-one  9  60 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperidin-1- 191-195 411.2 ylmethyl)-2H-chromen-2-one 24  61 3-[(3-methylpyridin-2-yl)amino]-7-(piperazin-1-yl)-2H- 164-167 337.3 chromen-2-one 24  62 3-[(4-methylpyridin-2-yl)amino]-7-(piperazin-1-yl)-2H- 182-185 337.3 chromen-2-one 24  63 3-[(5-methylpyridin-2-yl)amino]-7-(piperazin-1-yl)-2H- 225-228 337.3 chromen-2-one 24  64 3-[(6-methylpyridin-2-yl)amino]-7-(piperazin-1-yl)-2H- 135-137 337.3 chromen-2-one 24  65 3-[(5-chloropyridin-2-yl)amino]-7-(piperazin-1-yl)-2H- 253-255 357.2 chromen-2-one 24  66 7-(piperazin-1-yl)-3-(pyridin-3-ylamino)-2H-chromen-2- 172-175 323.3 one  3  67a 3-(4-iodo-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one  3*  68 3-(4-chloro-1,3-benzoxazol-2-yl)-7-(4-methylpiperazin-1- 229-231 396.2 yl)-2H-chromen-2-one 398.2  3  69 3-(4-chloro-1,3-benzoxazol-2-yl)-7-[(3R,5S)-3,5- 238-240 410.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 412.3  3  70a 3-(4-chloro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one 36  71 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 233 (D) 381.2 2H-chromen-2-one 383.2 36  72 3-(imidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)- 265-268 361.2 2H-chromen-2-one 67  73 7-(4-methylpiperazin-1-yl)-3-(1-methyl-1H-pyrazol-3-yl)- 183-186 325.3 2H-chromen-2-one 19*  74 7-(4-methylpiperazin-1-yl)-3-(1-phenyl-1H-pyrazol-3-yl)- 152-159 387.3 2H-chromen-2-one 24  75 3-(phenylamino)-7-(piperazin-1-yl)-2H-chromen-2-one 140-143 322.3 26  76 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)pyridin-2-yl]-2H- 185-190 376.3 chromen-2-one 26  77 3-(3-methoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2- 127-130 337.3 one 10  78 3-(1,3-benzothiazol-2-yl)-7-[(methylamino)methyl]-2H- 156-160 323.2 chromen-2-one 10  79 3-(1,3-benzothiazol-2-yl)-7-{[(2- 182-184 367.2 hydroxyethyl)(methyl)amino]methyl}-2H-chromen-2-one 20*  80 3-(4-methyl-1H-pyrazol-3-yl)-7-(piperazin-1-yl)-2H- 175-200 311.2 chromen-2-one (DR) 36  81 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 267 (D) 375.2 methylpiperazin-1-yl)-2H-chromen-2-one 68  82 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[4-(propan-2- 260 (D) 403.3 yl)piperazin-1-yl]-2H-chromen-2-one 36  83 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 196-198 381.2 2H-chromen-2-one 36  84 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 224-226 375.2 methylpiperazin-1-yl)-2H-chromen-2-one  4  85 3-(1,3-benzoxazol-2-yl)-7-(2,5-diazabicyclo[2.2.1]hept-2- ND 360.2 yl)-2H-chromen-2-one  4  86 3-(1,3-benzoxazol-2-yl)-7-(2,5-dimethylpiperazin-1-yl)- ND 376.3 2H-chromen-2-one 38  87 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-methylpiperazin-1- >310 362.3 yl)-2H-chromen-2-one 41  88 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H- 275-280 353.2 chromen-2-one 38*  89 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1-yl)-2H- 286 (D) 348.2 chromen-2-one 26  90 7-(piperazin-1-yl)-3-[6-(trifluoromethyl)pyridin-2-yl]-2H- 158-160 376.3 chromen-2-one 32  91 3-(1H-indazol-5-yl)-7-(piperazin-1-yl)-2H-chromen-2-one 250-252 347.2 36  92 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4- 186-189 409.2 diazepan-1-yl)-2H-chromen-2-one 36  93 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(2R,5S)-2,5- 245-247 409.2 dimethylpiperazin-1-yl]-2H-chromen-2-one 36  94 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-(4- 290-292 395.2 methylpiperazin-1-yl)-2H-chromen-2-one 397.2 67  95 7-(4-ethylpiperazin-1-yl)-3-(6-methylimidazo[1,2- 266-269 389.3 a]pyridin-2-yl)-2H-chromen-2-one 41  96 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin- >310 367.2 1-yl)-2H-chromen-2-one 41  97 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4- >300 381.3 methylpiperazin-1-yl)-2H-chromen-2-one 41  98 3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin- >300 367.2 1-yl)-2H-chromen-2-one 10  99 3-(1,3-benzothiazol-2-yl)-7-{[(1,3-dihydroxypropan-2- 194-197 383.2 yl)amino]methyl}-2H-chromen-2-one 67 100 7-(4-ethylpiperazin-1-yl)-3-(8-methylimidazo[1,2- 211-213 389.3 a]pyridin-2-yl)-2H-chromen-2-one 36 101 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 249-251 403.3 propylpiperazin-1-yl)-2H-chromen-2-one 67 102 7-[4-(2-hydroxyethyl)piperazin-1-yl]-3-(8- 210-212 405.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 103 3-(6-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 237-240 365.2 2H-chromen-2-one 67 104 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-[4-(2- 245-250 425.2 hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one 36 105 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5- 220-225 409.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 36 106 tert-butyl {(3S)-1-[3-(6-chloroimidazo[1,2-a]pyridin-2-yl)- >300 418.3 2-oxo-2H-chromen-7-yl]pyrrolidin-3-yl}carbamate 38 107 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[1,2- 256-258 376.3 a]pyrimidin-2-yl)-2H-chromen-2-one 67 108 7-(4-ethylpiperazin-1-yl)-3-(imidazo[1,2-a]pyrimidin-2- 300-302 376.3 yl)-2H-chromen-2-one 38 109 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-propylpiperazin-1- 291-293 390.3 yl)-2H-chromen-2-one  1 110a 3-([1,3]oxazolo[4,5-b]pyridin-2-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one 67 111 7-(4-methylpiperazin-1-yl)-3-([1,3]oxazolo[4,5-b]pyridin- ND 363.3 2-yl)-2H-chromen-2-one 31* 112 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-4-methyl-7- 224-227 395.2 (piperazin-1-yl)-2H-chromen-2-one 32 113 3-(5-chloropyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2- 180-182 342.3 one 36 114 7-(piperazin-1-yl)-3-[7-(trifluoromethyl)imidazo[1,2- 277-287 415.2 a]pyridin-2-yl]-2H-chromen-2-one 36 115 7-(4-methylpiperazin-1-yl)-3-[7- 274-280 429.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 36 116 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[7- 257-264 443.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 41* 117 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methylpiperazin- 256-258 367.2 1-yl)-2H-chromen-2-one 38 118 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-methyl-1,4- 252-254 376.3 diazepan-1-yl)-2H-chromen-2-one 36 119 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(4- 245-247 423.3 propylpiperazin-1-yl)-2H-chromen-2-one 425.3 36 120 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5- 286 (D) 409.2 dimethylpiperazin-1-yl]-2H-chromen-2-one 411.2 67 121 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[4-(2- 247-250 425.2 hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one 427.2 36 122 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 238-241 409.2 (dimethylamino)pyrrolidin-1-yl]-2H-chromen-2-one 411.2 36 123 3-(7-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5- 223-231 409.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 32* 124 7-(piperazin-1-yl)-3-[2-(trifluoromethyl)pyridin-3-yl]-2H- 197-200 376.2 chromen-2-one 32 125 7-(4-methylpiperazin-1-yl)-3-[2-(trifluoromethyl)pyridin- 180-182 390.3 3-yl]-2H-chromen-2-one 32 126 3-(3-fluoropyridin-4-yl)-7-(piperazin-1-yl)-2H-chromen-2- 202-204 326.3 one 67 127 3-(1,3-benzothiazol-2-yl)-7-{[(3R)-1-ethylpyrrolidin-3- 195-198 393.3 yl]oxy}-2H-chromen-2-one 52* 128 3-(imidazo[1,2-b]pyridazin-2-yl)-7-(4-methylpiperazin-1- 284-285 362.3 yl)-2H-chromen-2-one 38 129a 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3- NI NI (imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 38 130 7-{[2-(dimethylamino)ethyl](methyl)amino}-3- 175-180 364.2 (imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 36 131 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 260-270 361.2 2H-chromen-2-one 36 132 3-(5-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 239-249 361.2 2H-chromen-2-one 36 133 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(7- 210-217 389.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 134 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 252-262 375.2 methylpiperazin-1-yl)-2H-chromen-2-one 36 135 3-(5-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 263-272 375.2 methylpiperazin-1-yl)-2H-chromen-2-one 36 136 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8- 243-246 389.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 67 137 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,4,5- 244-247 423.3 trimethylpiperazin-1-yl]-2H-chromen-2-one 425.3 36 138 3-(6-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4- 266-269 379.2 methylpiperazin-1-yl)-2H-chromen-2-one 36 139 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[1,2- 261 (D) 375.3 a]pyridin-2-yl)-2H-chromen-2-one 67 140 3-(imidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,4,5- ND 389.4 trimethylpiperazin-1-yl]-2H-chromen-2-one 41 141a 3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin- ND 367.3 1-yl)-2H-chromen-2-one 36 142 7-(4-methyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2- 175-180 389.2 a]pyridin-2-yl)-2H-chromen-2-one 15* 143 3-(1,3-benzothiazol-2-yl)-7-[1-(dimethylamino)ethyl]-2H- 130-133 351.2 chromen-2-one 15 144 3-(1,3-benzothiazol-2-yl)-7-[1-(propan-2-ylamino)ethyl]- 135-137 365.2 2H-chromen-2-one  4* 145 3-(1,3-benzothiazol-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)- 217-220 392.2 2H-chromen-2-one  4 146 3-(1,3-benzothiazol-2-yl)-7-{[2- 155-157 380.3 (dimethylamino)ethyl](methyl)amino}-2H-chromen-2-one 31 147 3-(1,3-benzothiazol-2-yl)-4-methyl-7-(piperazin-1-yl)-2H- 234-236 378.2 chromen-2-one 10* 148 7-{[(2-hydroxyethyl)(methyl)amino]methyl}-3-(6- 166-169 364.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 149 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 236-238 365.2 2H-chromen-2-one 36 150 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4- 278-280 379.3 methylpiperazin-1-yl)-2H-chromen-2-one 67 151 7-(4-ethylpiperazin-1-yl)-3-(2-methylimidazo[2,1- 205-208 395.3 b][1,3]thiazol-6-yl)-2H-chromen-2-one 41 152 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(2- 210-212 395.3 methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one 41 153 7-(4-methyl-1,4-diazepan-1-yl)-3-(2-methylimidazo[2,1- 179-184 395.3 b][1,3]thiazol-6-yl)-2H-chromen-2-one 41 154 7-[3-(dimethylamino)pyrrolidin-1-yl]-3-(2- 180-183 395.3 methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one  6 155 8-fluoro-7-(piperazin-1-yl)-3-(pyridin-2-yl)-2H-chromen- 147-153 326.3 2-one  7 156 8-fluoro-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7- 313-319 379.3 (piperazin-1-yl)-2H-chromen-2-one  6 157 3-(1,3-benzothiazol-2-yl)-6-fluoro-7-(piperazin-1-yl)-2H- 255-260 382.3 chromen-2-one  7 158 6-fluoro-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7- 245-250 379.2 (piperazin-1-yl)-2H-chromen-2-one  6 159 3-(1,3-benzoxazol-2-yl)-5-fluoro-7-(piperazin-1-yl)-2H- 245-250 366.3 chromen-2-one  6* 160 3-(1,3-benzothiazol-2-yl)-5-fluoro-7-(piperazin-1-yl)-2H- 256-260 382.2 chromen-2-one  6 161 5-fluoro-7-(piperazin-1-yl)-3-(pyridin-2-yl)-2H-chromen- 221-225 326.2 2-one  7* 162 5-fluoro-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7- 265-270 379.2 (piperazin-1-yl)-2H-chromen-2-one 32 163 3-(6-methylpyridin-3-yl)-7-(piperazin-1-yl)-2H-chromen- 148-150 322.3 2-one 32 164 7-(4-methylpiperazin-1-yl)-3-(6-methylpyridin-3-yl)-2H- 158-160 336.3 chromen-2-one 32 165 3-(2-methoxypyridin-4-yl)-7-(4-methylpiperazin-1-yl)-2H- 169-171 352.3 chromen-2-one 36 166 7-[(2R,5S)-2,5-dimethylpiperazin-1-yl]-3-(8- ND 389.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 41 167 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[2,1- 263-265 381.3 b][1,3]thiazol-6-yl)-2H-chromen-2-one 67 168 3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-7- 267-275 457.4 [(3R,5S)-3,4,5-trimethylpiperazin-1-yl]-2H-chromen-2-one 38 169 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3- 285-287 362.3 methylpiperazin-1-yl]-2H-chromen-2-one 38 170 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3- 282-285 362.3 methylpiperazin-1-yl]-2H-chromen-2-one 36 173 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(6- 212-215 373.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 174 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6- 235-237 389.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 175 7-{[2-(dimethylamino)ethyl](methyl)amino}-3-(6- 140-180 377.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (D) 36 176 7-(1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyridin-2- 218-220 375.2 yl)-2H-chromen-2-one 36 177 tert-butyl {(3S)-1-[3-(6-methylimidazo[1,2-a]pyridin-2-yl)- 225-230 461.3 2-oxo-2H-chromen-7-yl]pyrrolidin-3-yl}carbamate 67 178 7-(4-ethylpiperazin-1-yl)-3-(3-methylimidazo[2,1- 178-180 395.3 b][1,3]thiazol-6-yl)-2H-chromen-2-one 41 179 7-(4-methyl-1,4-diazepan-1-yl)-3-(3-methylimidazo[2,1- 182-185 395.3 b][1,3]thiazol-6-yl)-2H-chromen-2-one 32 180 3-(2-chloropyridin-4-yl)-7-(piperazin-1-yl)-2H-chromen-2- 190-192 342.3 one 38 181 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[methyl(1- 215-217 376.3 methylpyrrolidin-3-yl)amino]-2H-chromen-2-one 41 182 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(3- 211-215 395.3 methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one 36 183 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3- 215-218 395.3 methylpiperazin-1-yl]-2H-chromen-2-one 397.3 36 184 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 215-217 395.3 methylpiperazin-1-yl]-2H-chromen-2-one 397.3 41 185 3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4- 213-216 381.3 methylpiperazin-1-yl)-2H-chromen-2-one 38 186a 7-(1,4-diazepan-1-yl)-3-(imidazo[1,2-a]pyrimidin-2-yl)- NI NI 2H-chromen-2-one 30* 187 7-(piperazin-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H- 236-238 347.3 chromen-2-one 30 188 7-(4-methylpiperazin-1-yl)-3-(pyrazolo[1,5-a]pyridin-2- 235-237 361.3 yl)-2H-chromen-2-one 30 189 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(pyrazolo[1,5- 188-190 375.3 a]pyridin-2-yl)-2H-chromen-2-one 67 190 7-[4-(2-hydroxyethyl)piperazin-1-yl]-3-(pyrazolo[1,5- 201-205 391.3 a]pyridin-2-yl)-2H-chromen-2-one 30 191 7-(2,5-diazabicyclo[2.2.2]oct-2-yl)-3-(pyrazolo[1,5- 182-185 391.3 a]pyridin-2-yl)-2H-chromen-2-one 30 192 7-(1,4-diazepan-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H- 178-180 361.3 chromen-2-one 30 193 7-(4-methyl-1,4-diazepan-1-yl)-3-(pyrazolo[1,5-a]pyridin- 159-163 375.3 2-yl)-2H-chromen-2-one 67 194 7-(4-ethylpiperazin-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)- 246-248 375.3 2H-chromen-2-one 30 195 7-(4-propylpiperazin-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)- 206-208 359.3 2H-chromen-2-one 68 196 7-[4-(propan-2-yl)piperazin-1-yl]-3-(pyrazolo[1,5- 243-246 389.3 a]pyridin-2-yl)-2H-chromen-2-one 65 197a 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(piperidin-4-yloxy)- NI NI 2H-chromen-2-one  9 198 7-[(dimethylamino)methyl]-3-(imidazo[2,1-b][1,3]thiazol- 135-140 326.2 6-yl)-2H-chromen-2-one  9 199 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(propan-2- 141-145 340.3 ylamino)methyl]-2H-chromen-2-one 36 200 7-[3-(dimethylamino)piperidin-1-yl]-3-(6- 167-169 403.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 67 201 7-(4-ethylpiperazin-1-yl)-3-(imidazo[2,1-b][1,3]thiazol-6- 202-205 381.3 yl)-2H-chromen-2-one 41 202 7-{[2-(dimethylamino)ethyl](methyl)amino}-3- 185-188 369.3 (imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one 41 203 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methyl-1,4- 228-231 381.3 diazepan-1-yl)-2H-chromen-2-one 41 204 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-3- 233-237 367.2 methylpiperazin-1-yl]-2H-chromen-2-one 41 205 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3S)-3- 230-233 367.2 methylpiperazin-1-yl]-2H-chromen-2-one 41 206 7-(1,4-diazepan-1-yl)-3-(imidazo[2,1-b][1,3]thiazol-6-yl)- 225-230 367.2 2H-chromen-2-one 36 207 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 220-222 403.3 propylpiperazin-1-yl)-2H-chromen-2-one 36 208 2-[7-(4-methylpiperazin-1-yl)-2-oxo-2H-chromen-3- 291 (D) 386.3 yl]imidazo[1,2-a]pyridine-6-carbonitrile 36 209 7-(piperazin-1-yl)-3-[8-(trifluoromethyl)imidazo[1,2- 249-252 415.3 a]pyridin-2-yl]-2H-chromen-2-one 36 210 7-(4-methylpiperazin-1-yl)-3-[8- 235-237 429.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 36 211 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[8- 295-298 443.4 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 36 212 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(1,4-diazepan-1- 170-173 395.3 yl)-2H-chromen-2-one 397.3 36 213 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 234-244 375.3 methylpiperazin-1-yl]-2H-chromen-2-one 36 214 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3- 222 (S), 375.3 methylpiperazin-1-yl]-2H-chromen-2-one 242-244 36 215 7-(3,3-dimethylpiperazin-1-yl)-3-(7-methylimidazo[1,2- 217-223 389.3 a]pyridin-2-yl)-2H-chromen-2-one 36 216 7-(1,4-diazepan-1-yl)-3-(7-methylimidazo[1,2-a]pyridin-2- 236 (S), 375.3 yl)-2H-chromen-2-one 248-252 36 217 7-(4-methyl-1,4-diazepan-1-yl)-3-(7-methylimidazo[1,2- 200-206 389.3 a]pyridin-2-yl)-2H-chromen-2-one 33* 218 3-(6-methoxypyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen- 162-165 338.2 2-one 36 219 7-(4-aminopiperidin-1-yl)-3-(6-methylimidazo[1,2- 250-252 375.3 a]pyridin-2-yl)-2H-chromen-2-one 36 220 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3- 185-188 375.3 methylpiperazin-1-yl]-2H-chromen-2-one 36 221 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[methyl(pyridin- 220-223 397.4 3-ylmethyl)amino]-2H-chromen-2-one 36 222 7-(3,3-dimethylpiperazin-1-yl)-3-(6-methylimidazo[1,2- 177-180 389.4 a]pyridin-2-yl)-2H-chromen-2-one 38 223 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1- 295-298 362.3 yl)-2H-chromen-2-one 38 224 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-(4- ND 376.4 methylpiperazin-1-yl)-2H-chromen-2-one 38 225 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(7- 246-252 390.4 methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 38 226 7-{[2-(dimethylamino)ethyl](methyl)amino}-3-(7- 188-191 378.3 methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 38 227 7-(4-methyl-1,4-diazepan-1-yl)-3-(7-methylimidazo[1,2- 232-236 390.3 a]pyrimidin-2-yl)-2H-chromen-2-one 38 228 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3- 297-300 376.3 methylpiperazin-1-yl]-2H-chromen-2-one 38 229 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3- 298-301 376.3 methylpiperazin-1-yl]-2H-chromen-2-one 38 230 7-(1,4-diazepan-1-yl)-3-(7-methylimidazo[1,2-a]pyrimidin- 286-288 376.3 2-yl)-2H-chromen-2-one 41 231 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-3- 178-181 381.3 methylpiperazin-1-yl]-2H-chromen-2-one 41 232 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3S)-3- 177-182 381.3 methylpiperazin-1-yl]-2H-chromen-2-one 41 233 7-(1,4-diazepan-1-yl)-3-(2-methylimidazo[2,1- 188-191 381.3 b][1,3]thiazol-6-yl)-2H-chromen-2-one 32 234 3-(4-methoxypyridin-3-yl)-7-(piperazin-1-yl)-2H-chromen- 179-181 338.3 2-one 32 235 3-(4-chloropyridin-3-yl)-7-(piperazin-1-yl)-2H-chromen-2- 175-177 342.3 one 21 236 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[4- 215-219 410.3 (trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one 21 237 7-(1,4-diazepan-1-yl)-3-[4-(trifluoromethyl)-1,3-thiazol-2- 200 (S), 396.2 yl]-2H-chromen-2-one 228-231 21 238 7-(4-methyl-1,4-diazepan-1-yl)-3-[4-(trifluoromethyl)-1,3- 218-225 410.2 thiazol-2-yl]-2H-chromen-2-one 21 239 7-[(3S)-3-methylpiperazin-1-yl]-3-[4-(trifluoromethyl)-1,3- 234-238 396.2 thiazol-2-yl]-2H-chromen-2-one 21 240 7-[(3R)-3-methylpiperazin-1-yl]-3-[4-(trifluoromethyl)- 234-238 396.2 1,3-thiazol-2-yl]-2H-chromen-2-one 39* 241 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1- >300 362.2 yl)-2H-chromen-2-one 39 242 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-(4- >310 376.3 methylpiperazin-1-yl)-2H-chromen-2-one 39 243 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6- 308-310 390.3 methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 36 244 3-(8-cyclopropylimidazo[1,2-a]pyridin-2-yl)-7-(4- 198-202 401.1 methylpiperazin-1-yl)-2H-chromen-2-one 36 245 3-(8-bromoimidazo[1,2-a]pyridin-2-yl)-7-(4- 217-220 440.1 methylpiperazin-1-yl)-2H-chromen-2-one 442.1 36 246 7-(4-methyl-1,4-diazepan-1-yl)-3-(8-methylimidazo[1,2- 138-140 389.3 a]pyridin-2-yl)-2H-chromen-2-one 36 247 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3- 299 (D) 375.3 methylpiperazin-1-yl]-2H-chromen-2-one 36 248 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 162-166 375.3 methylpiperazin-1-yl]-2H-chromen-2-one 36 249 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(3,3- 216-220 409.2 dimethylpiperazin-1-yl)-2H-chromen-2-one 411.2 39 250 7-(4-methyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2- 285-287 390.3 a]pyrimidin-2-yl)-2H-chromen-2-one 10 251 7-{[(1-hydroxypropan-2-yl)amino]methyl}-3-(6- 224-227 364.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 10 252 7-[(4-hydroxypiperidin-1-yl)methyl]-3-(6- 261-264 390.4 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 10 253 7-[(3-hydroxypyrrolidin-1-yl)methyl]-3-(6- 227-230 376.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one  6 254 5-fluoro-7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3- 249-253 434.3 benzoxazol-2-yl]-2H-chromen-2-one 36 255 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(octahydro-6H- 220-230 401.2 pyrrolo[3,4-b]pyridin-6-yl)-2H-chromen-2-one 32 256 3-(2-ethoxypyridin-3-yl)-7-(piperazin-1-yl)-2H-chromen- 186-188 352.3 2-one 32 257 3-(6-methoxypyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H- 162-164 352.3 chromen-2-one 26 258 3-(1-methyl-1H-indol-3-yl)-7-(piperazin-1-yl)-2H- 201-203 360.3 chromen-2-one 26 259 3-(1-methyl-1H-indol-3-yl)-7-(4-methylpiperazin-1-yl)- 185-187 374.3 2H-chromen-2-one 36 260 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1- 219-229 375.4 yl)-2H-chromen-2-one 36 261 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-(4- 232-238 389.4 methylpiperazin-1-yl)-2H-chromen-2-one 36 262 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)- 227-237 403.4 3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one 36 263 3-(6-chloro-8-methylimidazo[1,2-a]pyridin-2-yl)-7- 224-233 395.3 (piperazin-1-yl)-2H-chromen-2-one 36 264 3-(6-chloro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 238 (S), 409.3 methylpiperazin-1-yl)-2H-chromen-2-one 253-258 36 265 3-(6-chloro-8-methylimidazo[1,2-a]pyridin-2-yl)-7- 271-281 423.3 [(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one 21 266 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-[4- 211-220 394.2 (trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one 36 267 7-[(3R)-3-methylpiperazin-1-yl]-3-[7- 252-260 429.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 36 268 7-[(3S)-3-methylpiperazin-1-yl]-3-[7- 252-260 429.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 36 269 7-(3,3-dimethylpiperazin-1-yl)-3-[7- 221-227 444.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 10 270 3-(4-chloro-1,3-benzothiazol-2-yl)-7-{[(1-hydroxypropan- 186-190 401.2 2-yl)amino]methyl}-2H-chromen-2-one 10 271 3-(4-chloro-1,3-benzothiazol-2-yl)-7-{[(2- 193-196 401.2 hydroxyethyl)(methyl)amino]methyl}-2H-chromen-2-one 10 272 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(3- 188-192 413.2 hydroxypyrrolidin-1-yl)methyl]-2H-chromen-2-one 10 273 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(4-hydroxypiperidin- 193-196 427.2 1-yl)methyl]-2H-chromen-2-one 25 274a 3-(2-methylpyrimidin-4-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one 36 275 7-(1,4-diazepan-1-yl)-3-[7-(trifluoromethyl)imidazo[1,2- 253-262 429.3 a]pyridin-2-yl]-2H-chromen-2-one 36 276 7-(4-methyl-1,4-diazepan-1-yl)-3-[7- 244-249 443.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 36 277 7-[(2R,5S)-2,5-dimethylpiperazin-1-yl]-3-[7- 213-219 443.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 25 278a 3-(2-cyclopropylpyrimidin-4-yl)-7-(piperazin-1-yl)-2H- NI NI chromen-2-one 25 279a 7-(piperazin-1-yl)-3-[2-(propan-2-yl)pyrimidin-4-yl]-2H- NI NI chromen-2-one 36 280 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4- 161-163 409.2 diazepan-1-yl)-2H-chromen-2-one 411.2 36 281 7-(1,4-diazepan-1-yl)-3-(8-methylimidazo[1,2-a]pyridin-2- 138-140 375.3 yl)-2H-chromen-2-one 36 282 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[methyl(1- 181-184 403.3 methylpiperidin-4-yl)amino]-2H-chromen-2-one 21* 283 7-[(3S)-3-methylpiperazin-1-yl]-3-(4-methyl-1,3-thiazol-2- 194-199 342.2 yl)-2H-chromen-2-one 21 284 7-(1,4-diazepan-1-yl)-3-(4-methyl-1,3-thiazol-2-yl)-2H- 195-203 342.2 chromen-2-one 21 285 7-(4-methyl-1,4-diazepan-1-yl)-3-(4-methyl-1,3-thiazol-2- 190-200 356.2 yl)-2H-chromen-2-one 21 286 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(4-methyl-1,3- 178-183 356.2 thiazol-2-yl)-2H-chromen-2-one 36 287 3-(7-ethylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)- 253-263 375.3 2H-chromen-2-one 36 288 3-(7-ethylimidazo[1,2-a]pyridin-2-yl)-7-(4- 203-211 389.3 methylpiperazin-1-yl)-2H-chromen-2-one 36 289 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(7- 183-188 403.3 ethylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one  8* 290 3-(3,5-difluorophenyl)-5-fluoro-7-(piperazin-1-yl)-2H- 193-198 361.3 chromen-2-one  8 291 3-(3,5-difluorophenyl)-7-(piperazin-1-yl)-2H-chromen-2- 202-206 343.2 one  6 292 5-fluoro-3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(piperazin-1- 225-230 384.3 yl)-2H-chromen-2-one 36 293 7-(4-methyl-1,4-diazepan-1-yl)-3-[8- 196-199 443.2 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 36 294 3-(6-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4- 152-155 393.2 diazepan-1-yl)-2H-chromen-2-one 36 295 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4- 174-176 393.2 diazepan-1-yl)-2H-chromen-2-one 67 296 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3,4- 199-202 409.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 411.3 67 297 7-(4-methylpiperazin-1-yl)-3-(2-methylpyrimidin-4-yl)- 200~300 337.3 2H-chromen-2-one (D) 67 298 3-(2-cyclopropylpyrimidin-4-yl)-7-(4-methylpiperazin-1- 200~300 363.3 yl)-2H-chromen-2-one (D) 21 299 7-[(2S,5R)-2,5-dimethylpiperazin-1-yl]-3-(4-methyl-1,3- 184-190 356.2 thiazol-2-yl)-2H-chromen-2-one 21 300 7-[(3R)-3-methylpiperazin-1-yl]-3-(4-methyl-1,3-thiazol-2- 176 (S), 342.3 yl)-2H-chromen-2-one 192-198 21 301 7-(3,3-dimethylpiperazin-1-yl)-3-(4-methyl-1,3-thiazol-2- 204-209 356.3 yl)-2H-chromen-2-one 30 302 3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-7-(piperazin-1- 228-231 361.3 yl)-2H-chromen-2-one 30 303 7-(4-methylpiperazin-1-yl)-3-(5-methylpyrazolo[1,5- 279-281 375.3 a]pyridin-2-yl)-2H-chromen-2-one 30 304 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(5- 200-202 389.3 methylpyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one 30 305 7-(3,3-dimethylpiperazin-1-yl)-3-(5-methylpyrazolo[1,5- 203-205 389.3 a]pyridin-2-yl)-2H-chromen-2-one 30 306 7-[(3R)-3-methylpiperazin-1-yl]-3-(5-methylpyrazolo[1,5- 183-187 375.3 a]pyridin-2-yl)-2H-chromen-2-one 67 307 7-(4-ethylpiperazin-1-yl)-3-(5-methylpyrazolo[1,5- 257-259 389.3 a]pyridin-2-yl)-2H-chromen-2-one 30 308 3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-7-(4- 228-230 403.3 propylpiperazin-1-yl)-2H-chromen-2-one 30 309 7-(1,4-diazepan-1-yl)-3-(5-methylpyrazolo[1,5-a]pyridin- 203-206 375.3 2-yl)-2H-chromen-2-one 30 310 7-(4-methyl-1,4-diazepan-1-yl)-3-(5-methylpyrazolo[1,5- 175-177 389.3 a]pyridin-2-yl)-2H-chromen-2-one  7 311 5-fluoro-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin- 278-283 371.2 1-yl)-2H-chromen-2-one  7 312 5-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1- 298-302 366.2 yl)-2H-chromen-2-one  1 313 3-(1H-benzimidazol-2-yl)-7-(piperazin-1-yl)-2H-chromen- 254-258 347.2 2-one  1 314 7-(piperazin-1-yl)-3-(9H-purin-8-yl)-2H-chromen-2-one 291-297 349.2 32 315 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6- 175-177 366.3 methoxypyridin-2-yl)-2H-chromen-2-one 26* 316 3-(3,4-dimethoxyphenyl)-7-(piperazin-1-yl)-2H-chromen- 168-170 367.2 2-one 32 317 3-(3,4-dimethoxyphenyl)-7-(4-methylpiperazin-1-yl)-2H- 189-191 381.3 chromen-2-one 32 318 3-(4-methylthiophen-2-yl)-7-(piperazin-1-yl)-2H-chromen- 218-220 327.1 2-one 32 319 7-(piperazin-1-yl)-3-(thiophen-3-yl)-2H-chromen-2-one 175-177 313.1 32 320 7-(4-methylpiperazin-1-yl)-3-(thiophen-3-yl)-2H-chromen- 151-153 327.1 2-one 65 321a 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-pyrrolidin-3- NI NI yloxy]-2H-chromen-2-one 65 322a 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)- NI NI pyrrolidin-3-yloxy]-2H-chromen-2-one 65 323a 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin- NI NI 3-yloxy]-2H-chromen-2-one 65 324a 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-pyrrolidin-3- NI NI yloxy]-2H-chromen-2-one 65 325a 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)- NI NI pyrrolidin-3-yloxy]-2H-chromen-2-one 65 326a 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin- NI NI 3-yloxy]-2H-chromen-2-one 65 327a 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)- NI NI pyrrolidin-3-yloxy]-2H-chromen-2-one 36 328 3-(6-fluoro-8-methylimidazo[1,2-a]pyridin-2-yl)-7- 223-230 379.3 (piperazin-1-yl)-2H-chromen-2-one 36 329 3-(6-fluoro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 223-233 393.3 methylpiperazin-1-yl)-2H-chromen-2-one 36 330 3-(6-fluoro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 191-198 407.4 methyl-1,4-diazepan-1-yl)-2H-chromen-2-one 36 331 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-fluoro-8- 290-300 407.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 332 3-(8-ethyl-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 172-176 417.4 methyl-1,4-diazepan-1-yl)-2H-chromen-2-one 36 333 3-(7-ethylimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4- 181-187 403.4 diazepan-1-yl)-2H-chromen-2-one 36 334 3-(8-ethyl-6-methylimidazo[1,2-a]pyridin-2-yl)-7- 198-208 389.4 (piperazin-1-yl)-2H-chromen-2-one 56 335 5-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-methyl- 300-302 394.3 1,4-diazepan-1-yl)-2H-chromen-2-one 56 336 7-(1,4-diazepan-1-yl)-5-fluoro-3-(imidazo[1,2-a]pyrimidin- 305-307 380.3 2-yl)-2H-chromen-2-one 38 337 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-(4-methyl-1,4- 289-292 410.3 diazepan-1-yl)-2H-chromen-2-one 36 338 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8- 176-180 393.3 fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 67 339 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3,4- 184-186 409.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 411.3 36 340 3-(8-ethyl-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 203-210 403.4 methylpiperazin-1-yl)-2H-chromen-2-one 36 341 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8-ethyl-6- 203-208 417.4 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 342 3-(8-chloro-6-methylimidazo[1,2-a]pyridin-2-yl)-7- 258-263 423.3 [(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one 36 343 3-(8-chloro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 245-253 409.2 methylpiperazin-1-yl)-2H-chromen-2-one 36 344 3-(8-chloro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 224-230 423.3 methyl-1,4-diazepan-1-yl)-2H-chromen-2-one 10 345 7-{[(2-hydroxyethyl)(methyl)amino]methyl}-3- 145-148 356.2 (imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one 10 346 7-[(4-hydroxypiperidin-1-yl)methyl]-3-(imidazo[2,1- 248-252 382.3 b][1,3]thiazol-6-yl)-2H-chromen-2-one 67 347 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-[4-(2- 288-296 426.3 hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one 38 348 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1- 275-277 410.3 yl)-2H-chromen-2-one 38 349 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R,5S)-3,5- 265-271 410.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 38 350 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3- 255-259 396.3 methylpiperazin-1-yl]-2H-chromen-2-one 56 351 5-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4- ND 380.3 methylpiperazin-1-yl)-2H-chromen-2-one 56 352 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-5-fluoro-3- 290-292 394.3 (imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 36 353 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 252-262 393.4 methylpiperazin-1-yl)-2H-chromen-2-one 36 354 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8-fluoro-6- 268-275 407.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 355 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 233-240 407.3 methyl-1,4-diazepan-1-yl)-2H-chromen-2-one 36 356 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7- 276-286 379.3 (piperazin-1-yl)-2H-chromen-2-one 36 357 7-(1,4-diazepan-1-yl)-3-(8-fluoroimidazo[1,2-a]pyridin-2- 210-213 379.2 yl)-2H-chromen-2-one 36 358 3-(8-ethylimidazo[1,2-a]pyridin-2-yl)-7-(4- 137-141 389.3 methylpiperazin-1-yl)-2H-chromen-2-one 33 359 3-(6-methoxypyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)- 155-158 366.3 2H-chromen-2-one 67 360 7-(4-ethylpiperazin-1-yl)-3-(6-methoxypyridin-2-yl)-2H- 145-147 366.3 chromen-2-one 33 361 3-(6-methoxypyridin-2-yl)-7-[(3R)-3-methylpiperazin-1- 150-152 352.3 yl]-2H-chromen-2-one 33 362 3-(6-methoxypyridin-2-yl)-7-[(3S)-3-methylpiperazin-1- 155-157 352.3 yl]-2H-chromen-2-one 32 363 7-(piperazin-1-yl)-3-(thiophen-2-yl)-2H-chromen-2-one 193-195 313.3 32 364 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(thiophen-2-yl)- 150-152 341.3 2H-chromen-2-one  8 365 3-(3,5-difluorophenyl)-5-fluoro-7-(4-methyl-1,4-diazepan- 161-164 389.2 1-yl)-2H-chromen-2-one  6 366 5-fluoro-3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(4- 256-260 398.3 methylpiperazin-1-yl)-2H-chromen-2-one  6 367 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-5-fluoro-3-(4- 268-272 412.3 fluoro-1,3-benzoxazol-2-yl)-2H-chromen-2-one  6 368 7-(1,4-diazepan-1-yl)-5-fluoro-3-(4-fluoro-1,3-benzoxazol- 240-245 398.3 2-yl)-2H-chromen-2-one  6 369 5-fluoro-3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(4-methyl-1,4- 224-228 412.3 diazepan-1-yl)-2H-chromen-2-one  6 370 3-(1H-benzimidazol-2-yl)-5-fluoro-7-(4-methylpiperazin- 281-284 379.2 1-yl)-2H-chromen-2-one  6 371 3-(1H-benzimidazol-2-yl)-7-[(3R,5S)-3,5- 288-294 393.3 dimethylpiperazin-1-yl]-5-fluoro-2H-chromen-2-one 56 372 5-fluoro-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(4- 268-271 385.3 methylpiperazin-1-yl)-2H-chromen-2-one 56 373 5-fluoro-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methyl- 205-207 399.3 1,4-diazepan-1-yl)-2H-chromen-2-one  6 374 3-(1H-benzimidazol-2-yl)-7-(1,4-diazepan-1-yl)-5-fluoro- 236-242 379.3 2H-chromen-2-one  6 375 3-(1H-benzimidazol-2-yl)-5-fluoro-7-(piperazin-1-yl)-2H- 245-250 365.3 chromen-2-one 38 376 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3- 260-262 396.2 methylpiperazin-1-yl]-2H-chromen-2-one 38 377a 7-[(1-benzylpyrrolidin-3-yl)(methyl)amino]-3-(7- NI NI methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 39 378 7-(1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyrimidin- 275-278 376.3 2-yl)-2H-chromen-2-one 67 379 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(7- 231-241 389.4 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 26 380 3-(6-fluoropyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2- 196-198 326.3 one 33 381 3-(6-ethoxypyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H- 170-172 366.3 chromen-2-one 26 382 3-(3,4-dimethoxyphenyl)-7-[(3R)-3-methylpiperazin-1-yl]- 143-145 381.3 2H-chromen-2-one 26 383 3-(3,4-dimethoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]- 140-143 381.3 2H-chromen-2-one 26 384 3-(3,4-dimethoxyphenyl)-7-[(3R,5S)-3,5- 130-132 395.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 27* 385 7-(piperazin-1-yl)-3-[6-(propan-2-yloxy)pyridin-2-yl]-2H- 177-180 366.3 chromen-2-one 28* 386 7-(piperazin-1-yl)-3-[6-(pyrrolidin-1-yl)pyridin-2-yl]-2H- 190-192 377.3 chromen-2-one 32 387 7-(1,4-diazepan-1-yl)-3-(3,5-dimethoxyphenyl)-2H- 238-240 381.3 chromen-2-one 56 388 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5- 290-300 427.2 dimethylpiperazin-1-yl]-5-fluoro-2H-chromen-2-one 36 389 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl- 164-169 403.3 1,4-diazepan-1-yl)-2H-chromen-2-one 56 390 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-5-fluoro-7-[(3R)-3- 266-276 413.2 methylpiperazin-1-yl]-2H-chromen-2-one 56* 391 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-5-fluoro-3-[7- 210-219 461.3 (trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen- 2-one 56 392 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-5-fluoro-7- 241-250 399.2 (piperazin-1-yl)-2H-chromen-2-one 56 393 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-5-fluoro-7-[(3S)-3- 268-278 413.2 methylpiperazin-1-yl]-2H-chromen-2-one  1 394 3-(4-methyl-1H-benzimidazol-2-yl)-7-(piperazin-1-yl)-2H- 206-211 361.3 chromen-2-one  1 395 3-(5-fluoro-1H-benzimidazol-2-yl)-7-(piperazin-1-yl)-2H- 295-300 365.2 chromen-2-one  9 396 3-(1H-benzimidazol-2-yl)-7-[(dimethylamino)methyl]-2H- 214-218 320.3 chromen-2-one 10 397 5-fluoro-7-(hydroxymethyl)-3-(imidazo[2,1-b][1,3]thiazol- 278-282 317.2 6-yl)-2H-chromen-2-one 46* 398 3-[8-(methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl]-7- ND 394.3 (piperazin-1-yl)-2H-chromen-2-one 46 399 7-(4-methylpiperazin-1-yl)-3-[8- ND 408.3 (methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl]-2H-chromen- 2-one 46 400 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[8- 283-285 422.3 (methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl]-2H-chromen- 2-one 46 401 7-(4-methyl-1,4-diazepan-1-yl)-3-[8- ND 422.3 (methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl]-2H-chromen- 2-one 36 402 3-(8-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1- 236-240 377.3 yl)-2H-chromen-2-one 36 403 3-(8-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(4- 202-205 391.2 methylpiperazin-1-yl)-2H-chromen-2-one  8 404 3-(3,4-dimethoxyphenyl)-5-fluoro-7-(piperazin-1-yl)-2H- 240 (D) 385.2 chromen-2-one  8 405 3-(3,4-dimethoxyphenyl)-5-fluoro-7-(4-methylpiperazin-1- ND 399.3 yl)-2H-chromen-2-one  8 406 3-(3,4-dimethoxyphenyl)-5-fluoro-7-(4-methyl-1,4- 134-140 413.2 diazepan-1-yl)-2H-chromen-2-one 32 407 3-(1-benzothiophen-2-yl)-7-(piperazin-1-yl)-2H-chromen- 243-245 363.3 2-one 32 408 3-(1-benzothiophen-2-yl)-7-[(3R,5S)-3,5- 271-273 391.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 32 409 3-(1-benzothiophen-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]- 264-266 377.3 2H-chromen-2-one 32 410 3-(1-benzothiophen-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]- 260-262 377.3 2H-chromen-2-one 32 411 3-(3,5-dimethoxyphenyl)-7-(4-methyl-1,4-diazepan-1-yl)- 151-153 395.3 2H-chromen-2-one 32 412 3-(3,5-dimethoxyphenyl)-7-[(3R)-3-methylpiperazin-1-yl]- 148-150 381.3 2H-chromen-2-one 32 413 3-(3,5-dimethoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]- 149-151 381.3 2H-chromen-2-one 27 414 3-[6-(cyclobutyloxy)pyridin-2-yl]-7-(piperazin-1-yl)-2H- 166-168 378.3 chromen-2-one 27 415 3-[6-(cyclobutyloxy)pyridin-2-yl]-7-(4-methylpiperazin-1- 158-160 392.3 yl)-2H-chromen-2-one 26 416 3-(3,4-dimethoxyphenyl)-5-fluoro-7-[(3R)-3- 115-117 399.3 methylpiperazin-1-yl]-2H-chromen-2-one 47 417 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[1,2- 248-250 376.3 a]pyrazin-2-yl)-2H-chromen-2-one 36 418 7-[(3R,5 S)-3,5-dimethylpiperazin-1-yl]-3-(8- 184-186 405.4 methoxyimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 419 3-(8-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4- 212-215 405.4 diazepan-1-yl)-2H-chromen-2-one 36 420 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)- 246-254 393.3 3-methylpiperazin-1-yl]-2H-chromen-2-one 36* 421 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 250-255 393.3 methylpiperazin-1-yl]-2H-chromen-2-one 56 422 5-fluoro-3-(imidazo[1,2-a]pyridin-2-yl)-7-(4- 263-269 379.3 methylpiperazin-1-yl)-2H-chromen-2-one 56 423 5-fluoro-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4- 232-237 393.3 methylpiperazin-1-yl)-2H-chromen-2-one 56 424 5-fluoro-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7- 268-278 379.3 (piperazin-1-yl)-2H-chromen-2-one 36 425 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 221-226 389.4 methylpiperazin-1-yl]-2H-chromen-2-one 36 426 7-(3,3-dimethylpiperazin-1-yl)-3-(8-fluoro-6- 275-284 407.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 427 7-(1,4-diazepan-1-yl)-3-(8-fluoro-6-methylimidazo[1,2- 242-252 393.3 a]pyridin-2-yl)-2H-chromen-2-one 42 428 3-(2-ethylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1- 231-236 381.3 yl)-2H-chromen-2-one 42* 429 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(2- 251-253 409.4 ethylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one 42 430 7-(1,4-diazepan-1-yl)-3-(2-ethylimidazo[2,1-b][1,3]thiazol- 185-189 395.3 6-yl)-2H-chromen-2-one 42 431 3-(2-ethylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methyl-1,4- 188-191 409.3 diazepan-1-yl)-2H-chromen-2-one 36 432 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(7- 225-230 405.3 methoxyimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 23* 433 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[1-(pyridin-2- 201-206 402.3 yl)-1H-imidazol-4-yl]-2H-chromen-2-one 36 434 3-(7-methoxyimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 250-256 391.3 methylpiperazin-1-yl]-2H-chromen-2-one 36 435 3-(7-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(4- 251-259 391.3 methylpiperazin-1-yl)-2H-chromen-2-one 36 436 3-(7-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4- 198-207 405.4 diazepan-1-yl)-2H-chromen-2-one 41 437 7-[(1R,5S,6s)-6-(dimethylamino)-3-azabicyclo[3.1.0]hex- 233-235 393.3 3-yl]-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2- one 41 438 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(imidazo[2,1- >300 393.3 b][1,3]thiazol-6-yl)-2H-chromen-2-one 38 439 7-[(1R,5S,6s)-6-(dimethylamino)-3-azabicyclo[3.1.0]hex- >300 388.4 3-yl]-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 38 440 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(imidazo[1,2- >300 388.4 a]pyrimidin-2-yl)-2H-chromen-2-one 55* 441 3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-7- 288-290 368.2 (piperazin-1-yl)-2H-chromen-2-one 55 442 3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-7-(4- 233-236 382.3 methylpiperazin-1-yl)-2H-chromen-2-one 55 443 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(2- 225-228 396.3 methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-2H-chromen- 2-one 26 444 7-[(3S)-3-methylpiperazin-1-yl]-3-(pyridin-2-yl)-2H- 145-147 322.3 chromen-2-one 29* 445 3-[6-(methylsulfanyl)pyridin-2-yl]-7-(piperazin-1-yl)-2H- 180-183 354.3 chromen-2-one 26 446 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(3,4- 239-241 397.3 dimethoxyphenyl)-5-fluoro-2H-chromen-2-one 32 447 3-(4-methoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2- 211-213 337.3 one 32 448 3-(4-methoxyphenyl)-7-[(3R)-3-methylpiperazin-1-yl]-2H- 123-126 351.3 chromen-2-one 32 449 3-(4-methoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H- 123-126 351.3 chromen-2-one 55 450 7-(1,4-diazepan-1-yl)-3-(2-methylimidazo[2,1- 215-218 382.2 b][1,3,4]thiadiazol-6-yl)-2H-chromen-2-one 55 451 7-(4-methyl-1,4-diazepan-1-yl)-3-(2-methylimidazo[2,1- 191-195 396.2 b][1,3,4]thiadiazol-6-yl)-2H-chromen-2-one 22* 452 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(1-phenyl-1H- 260-264 401.3 imidazol-4-yl)-2H-chromen-2-one 23 453 7-(4-methyl-1,4-diazepan-1-yl)-3-[2-methyl-1-(pyridin-2- 192-196 416.3 yl)-1H-imidazol-4-yl]-2H-chromen-2-one 47 454 7-(1,4-diazepan-1-yl)-3-(imidazo[1,2-a]pyrazin-2-yl)-2H- 247-249 362.2 chromen-2-one 47 455 3-(imidazo[1,2-a]pyrazin-2-yl)-7-(4-methyl-1,4-diazepan- ND 376.2 1-yl)-2H-chromen-2-one 47* 456 3-(imidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-yl)-2H- 258-260 348.2 chromen-2-one 47 457 3-(imidazo[1,2-a]pyrazin-2-yl)-7-(4-methylpiperazin-1-yl)- 246-249 362.3 2H-chromen-2-one 54* 458 3-(imidazo[1,2-c]pyrimidin-2-yl)-7-(4-methylpiperazin-1- 253-255 362.3 yl)-2H-chromen-2-one 54 459 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[1,2- 250-252 376.2 c]pyrimidin-2-yl)-2H-chromen-2-one 54 460 3-(imidazo[1,2-c]pyrimidin-2-yl)-7-(4-methyl-1,4- 225-227 376.2 diazepan-1-yl)-2H-chromen-2-one 36 461 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(quinoxalin-2- 234-236 387.3 yl)-2H-chromen-2-one 39 462 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3- 254-256 376.4 methylpiperazin-1-yl]-2H-chromen-2-one 39 463 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3- 258-261 376.4 methylpiperazin-1-yl]-2H-chromen-2-one 26 464 3-(3,4-dimethoxyphenyl)-5-fluoro-7-[(3S)-3- 118-120 399.3 methylpiperazin-1-yl]-2H-chromen-2-one 26 465 3-(2,4-dimethoxyphenyl)-7-(piperazin-1-yl)-2H-chromen- 171-173 367.3 2-one 26 466 3-(2,4-dimethoxyphenyl)-7-[(3R)-3-methylpiperazin-1-yl]- 101-103 381.3 2H-chromen-2-one 26 467 3-(2,4-dimethoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]- 103-105 381.3 2H-chromen-2-one 32 468 5-fluoro-3-(6-methoxypyridin-2-yl)-7-(piperazin-1-yl)-2H- 231-236 356.3 chromen-2-one 32 469 5-fluoro-3-(6-methoxypyridin-2-yl)-7-[(3S)-3- 199-201 370.3 methylpiperazin-1-yl]-2H-chromen-2-one 37 470 7-{[2-(dimethylamino)ethyl]amino}-3-(7- 156-159 363.3 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 67 471 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(8-fluoro-6- 270-277 407.2 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 32 472 3-(3,4-dimethoxyphenyl)-7-[(2S)-2-methylpiperazin-1-yl]- ND 381.3 2H-chromen-2-one 41 473 3-(2-chloroimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R,5S)- 270-273 415.2 3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one 37 474 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(1- 224-230 389.8 methylpiperidin-4-yl)amino]-2H-chromen-2-one 48 475 7-{[3-(dimethylamino)propyl]amino}-3-(7- 165-170 377.8 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 43 476 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6- 249-250 390.8 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 43 477 7-(1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2- ND 390.8 yl)-2H-chromen-2-one 41 478 3-(2-chloroimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4- 268-270 401.2 methylpiperazin-1-yl)-2H-chromen-2-one 41 479 3-(2-chloroimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methyl- 229-232 415.7 1,4-diazepan-1-yl)-2H-chromen-2-one 40* 480 3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-7-(4- 275-280 380.8 methylpiperazin-1-yl)-2H-chromen-2-one 40 481 3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3- 232-236 380.8 methylpiperazin-1-yl]-2H-chromen-2-one 55 482 3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-7-[(3S)- 205-209 382.7 3-methylpiperazin-1-yl]-2H-chromen-2-one 55 483 3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-7-[(3R)- 206-210 382.7 3-methylpiperazin-1-yl]-2H-chromen-2-one 32 484 3-(3-chloro-4-fluorophenyl)-7-(piperazin-1-yl)-2H- 186-188 359.3 chromen-2-one 32 485 3-(3-chloro-4-fluorophenyl)-7-[(3S)-3-methylpiperazin-1- 143-145 373.3 yl]-2H-chromen-2-one 26 486 3-(1,3-benzodioxol-5-yl)-7-(piperazin-1-yl)-2H-chromen- 218-220 351.3 2-one 26 487 3-(1,3-benzodioxol-5-yl)-7-[(3R,5S)-3,5- 123-125 379.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 26 488 3-(1,3-benzodioxol-5-yl)-7-[(3R)-3-methylpiperazin-1-yl]- 135-137 365.3 2H-chromen-2-one 26 489 3-(1,3-benzodioxol-5-yl)-7-[(3S)-3-methylpiperazin-1-yl]- 134-136 365.3 2H-chromen-2-one 26 490 7-[(3S)-3-methylpiperazin-1-yl]-3-[3- 141-143 389.3 (trifluoromethyl)phenyl]-2H-chromen-2-one 40 491 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6- 275-281 394.2 fluoroimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one 40 492 3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3- 230-236 380.8 methylpiperazin-1-yl]-2H-chromen-2-one 43 493 7-(4-methyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2- 234-235 390.2 a]pyrazin-2-yl)-2H-chromen-2-one 41 494 3-(2-chloroimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1- 240-242 387.7 yl)-2H-chromen-2-one 48 495 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperidin-4- 232-239 375.8 ylamino)-2H-chromen-2-one 48 496 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin- 244-254 361.7 3-ylamino]-2H-chromen-2-one 36 497 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7- 257-267 433.9 [(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one 36 498 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7- 254-263 419.8 [(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one 36 499 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4- 234-244 433.9 methyl-1,4-diazepan-1-yl)-2H-chromen-2-one 36 500 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7- 261-271 405.8 (piperazin-1-yl)-2H-chromen-2-one 36 501 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(8- 175-178 405.8 fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 40 502 3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1- 250-261 366.7 yl)-2H-chromen-2-one 36 503 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7- 254-264 419.9 [(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one 36 504 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4- 277-287 419.2 methylpiperazin-1-yl)-2H-chromen-2-one 36 505 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(8- 278 (D) 401.1 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 506 7-(3,8-diazabicyclo[3.2.1]oct-3-yl)-3-(8-fluoroimidazo[1,2- 232-235 391.8 a]pyridin-2-yl)-2H-chromen-2-one 36 507 7-(3,3-dimethylpiperazin-1-yl)-3-(8-fluoroimidazo[1,2- 180-182 393.3 a]pyridin-2-yl)-2H-chromen-2-one 36 508 7-(3,3-dimethylpiperazin-1-yl)-3-(6-fluoroimidazo[1,2- 182-185 393.3 a]pyridin-2-yl)-2H-chromen-2-one 26 509 3-(3-chlorophenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H- 149-151 355.3 chromen-2-one 26 510 3-(2-chloro-4-fluorophenyl)-7-[(3S)-3-methylpiperazin-1- 109-111 373.3 yl]-2H-chromen-2-one 26 511 3-(3-methylphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one 118-120 321.3 26 512 3-(3-methylphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H- 101-103 335.2 chromen-2-one 32 513 3-(2,3-dihydro-1,4-benzodioxin-6-yl)-7-[(3S)-3- 196-198 379.3 methylpiperazin-1-yl]-2H-chromen-2-one 32 514 3-(2,3-dihydro-1,4-benzodioxin-6-yl)-7-[(3R,5S)-3,5- 138-140 393.2 dimethylpiperazin-1-yl]-2H-chromen-2-one 43 515 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1- ND 376.2 yl)-2H-chromen-2-one 43 516 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 240-242 390.3 methylpiperazin-1-yl)-2H-chromen-2-one 43 517 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R,5S)- ND 404.3 3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one 43 518 7-(1,4-diazepan-1-yl)-3-(6,8-dimethylimidazo[1,2- 188-190 390.3 a]pyrazin-2-yl)-2H-chromen-2-one 43 519 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methyl- 253-255 404.3 1,4-diazepan-1-yl)-2H-chromen-2-one 37* 520 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl- 255-260 411.2 1,4-diazepan-1-yl)-2H-chromen-2-one 36 521 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(7- 216-223 401.1 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 37 522 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-(4- 232-238 397.1 methylpiperazin-1-yl)-2H-chromen-2-one 37 523 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5- 267-277 411.1 dimethylpiperazin-1-yl]-2H-chromen-2-one 37 524 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 218-224 397.2 methylpiperazin-1-yl]-2H-chromen-2-one 36 525 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 190-193 379.1 methylpiperazin-1-yl]-2H-chromen-2-one 36 526 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(3,8- 213-216 407.2 diazabicyclo[3.2.1]oct-3-yl)-2H-chromen-2-one 409.2 36 527 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(2,5- 178-182 407.2 diazabicyclo[2.2.2]oct-2-yl)-2H-chromen-2-one 409.2 36 528 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(8aS)- 235-238 405.2 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 57* 529 3-(indolizin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one 186-188 346.4 36 530 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3- 226-228 379.2 methylpiperazin-1-yl]-2H-chromen-2-one 36 531 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(8aR)- 238-241 405.8 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 37 532 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1- 276-286 383 yl)-2H-chromen-2-one 67 533 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8-fluoro-6- 269-277 407.1 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 534 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(7- 258-265 401.1 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 535 7-[(1R,5S)-8-methyl-3,8-diazabicyclo[3.2.1]oct-3-yl]-3-(7- 224-229 401.1 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 43* 536 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3- ND 390.2 methylpiperazin-1-yl]-2H-chromen-2-one 43 537 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3- ND 390.2 methylpiperazin-1-yl]-2H-chromen-2-one 32 538 3-(3,5-difluoro-2-methoxyphenyl)-7-(piperazin-1-yl)-2H- 109-111 373.2 chromen-2-one 32 539 3-(3,5-difluoro-2-methoxyphenyl)-7-[(3S)-3- 156-158 387.2 methylpiperazin-1-yl]-2H-chromen-2-one 32 540 3-(3,5-difluoro-2-methoxyphenyl)-7-[(3R,5S)-3,5- 109-111 401.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 26 541 3-(4-methoxy-3-methylphenyl)-7-(piperazin-1-yl)-2H- 171-173 351.3 chromen-2-one 26 542 3-(4-methoxy-3-methylphenyl)-7-[(3S)-3-methylpiperazin- 127-131 365.3 1-yl]-2H-chromen-2-one 26 543 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(4-methoxy-3- 111-113 379.3 methylphenyl)-2H-chromen-2-one 32 544 3-(3-fluoro-4-methoxyphenyl)-7-(piperazin-1-yl)-2H- 241-243 355.2 chromen-2-one 32 545 3-(3-fluoro-4-methoxyphenyl)-7-[(3S)-3-methylpiperazin- 141-143 369.3 1-yl]-2H-chromen-2-one 32 546 3-(2,3-difluorophenyl)-7-[(3S)-3-methylpiperazin-1-yl]- 116-118 357.3 2H-chromen-2-one 32 547 3-[6-(dimethylamino)pyridin-3-yl]-7-(piperazin-1-yl)-2H- 179-181 351.3 chromen-2-one 32 548 3-[6-(dimethylamino)pyridin-3-yl]-7-[(3S)-3- 194-196 365.3 methylpiperazin-1-yl]-2H-chromen-2-one 26 549 7-[(3S)-3-methylpiperazin-1-yl]-3-(pyridin-4-yl)-2H- 210-213 322.3 chromen-2-one 56 550 7-(1,4-diazepan-1-yl)-5-fluoro-3-(6-methylimidazo[1,2- 270-274 394 a]pyrazin-2-yl)-2H-chromen-2-one 43 551 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 221-222 376.1 methylpiperazin-1-yl)-2H-chromen-2-one 43 552 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8- 250-258 390.2 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 57 553 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(indolizin-2-yl)- 164-167 374.2 2H-chromen-2-one 58 554 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(1- 200-203 389.3 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 58 555 3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-(piperazin-1-yl)- 264-266 361.4 2H-chromen-2-one 58 556 7-(4-methyl-1,4-diazepan-1-yl)-3-(1-methylpyrrolo[1,2- 125-128 389.3 a]pyrazin-7-yl)-2H-chromen-2-one 58 557 7-(4-methylpiperazin-1-yl)-3-(1-methylpyrrolo[1,2- 190-192 375.2 a]pyrazin-7-yl)-2H-chromen-2-one 43 558 7-(4-methyl-1,4-diazepan-1-yl)-3-(8-methylimidazo[1,2- 180-182 390.2 a]pyrazin-2-yl)-2H-chromen-2-one 43 559 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3- 222-228 376.2 methylpiperazin-1-yl]-2H-chromen-2-one 36 560 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(8aS)- 296-306 419.2 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 36 561 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(8-fluoro-6- 287-297 419.2 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 48 562 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4- 255-261 390.1 ylamino)-2H-chromen-2-one 48* 563 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)- 132-188 376.1 pyrrolidin-3-ylamino]-2H-chromen-2-one (DR) 48 564 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)- 290-300 376.2 pyrrolidin-3-ylamino]-2H-chromen-2-one 57 565 3-(indolizin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H- ND 360.4 chromen-2-one 58 566 7-[(3S)-3-methylpiperazin-1-yl]-3-(1-methylpyrrolo[1,2- 184-186 375.2 a]pyrazin-7-yl)-2H-chromen-2-one 43 567 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-yl)- 288-290 362.2 2H-chromen-2-one 43 568 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 272-275 376.2 methylpiperazin-1-yl)-2H-chromen-2-one 43 569 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3- ND 376.2 methylpiperazin-1-yl]-2H-chromen-2-one 43 570 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3- ND 376.2 methylpiperazin-1-yl]-2H-chromen-2-one 43 571 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-yl)- 213-215 362.1 2H-chromen-2-one 43 572 7-(1,4-diazepan-1-yl)-3-(8-methylimidazo[1,2-a]pyrazin-2- 212-216 376.2 yl)-2H-chromen-2-one 43 573 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3- 211-217 376.2 methylpiperazin-1-yl]-2H-chromen-2-one 32 574 3-(3-methoxy-4-methylphenyl)-7-(piperazin-1-yl)-2H- 170-174 351.2 chromen-2-one 32 575 3-(3-methoxy-4-methylphenyl)-7-[(3S)-3-methylpiperazin- 166-170 365.3 1-yl]-2H-chromen-2-one 26 576 3-(4-fluoro-3-methoxyphenyl)-7-(piperazin-1-yl)-2H- 153-155 355.3 chromen-2-one 26 577 3-(4-fluoro-3-methoxyphenyl)-7-[(3S)-3-methylpiperazin- 189-191 369.1 1-yl]-2H-chromen-2-one 36 578 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(octahydro-2H- 230-233 419.1 pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 59* 579 7-(piperazin-1-yl)-3-(pyrrolo[1,2-a]pyrimidin-7-yl)-2H- 235-238 347.2 chromen-2-one 59 580 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(pyrrolo[1,2- ND 375.2 a]pyrimidin-7-yl)-2H-chromen-2-one 48 581 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-pyrrolidin- 243-253 361.2 3-ylamino]-2H-chromen-2-one 48 582 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)- 230-240 379.1 pyrrolidin-3-ylamino]-2H-chromen-2-one 48 583 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)- 231-238 379.1 pyrrolidin-3-ylamino]-2H-chromen-2-one 58 584 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(3- 172-174 389.3 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 67 585 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(8- 188-192 393.2 fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 58 586 7-[(3R)-3-methylpiperazin-1-yl]-3-(1-methylpyrrolo[1,2- 212-215 375.2 a]pyrazin-7-yl)-2H-chromen-2-one 58 587 7-(1,4-diazepan-1-yl)-3-(1-methylpyrrolo[1,2-a]pyrazin-7- 210-213 375.2 yl)-2H-chromen-2-one 58* 588 3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-(piperazin-1-yl)- 220 (D) 361.4 2H-chromen-2-one 58 589 7-(4-methyl-1,4-diazepan-1-yl)-3-(3-methylpyrrolo[1,2- 148-150 389.3 a]pyrazin-7-yl)-2H-chromen-2-one 58 590 7-(4-methylpiperazin-1-yl)-3-(3-methylpyrrolo[1,2- 212-214 375.2 a]pyrazin-7-yl)-2H-chromen-2-one 56 591 5-fluoro-7-(4-methyl-1,4-diazepan-1-yl)-3-(6- 210-212 408.2 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 56 592 5-fluoro-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 283-284 394.2 methylpiperazin-1-yl)-2H-chromen-2-one 56 593 5-fluoro-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)- ND 394.2 3-methylpiperazin-1-yl]-2H-chromen-2-one 65 594 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)- 254-258 363 pyrrolidin-3-yloxy]-2H-chromen-2-one 36 595 7-(5,8-diazaspiro[3.5]non-8-yl)-3-(7-methylimidazo[1,2- 226-233 401.2 a]pyridin-2-yl)-2H-chromen-2-one 36 596 7-(6,9-diazaspiro[4.5]dec-9-yl)-3-(7-methylimidazo[1,2- 180 (S), 415.2 a]pyridin-2-yl)-2H-chromen-2-one 204-209 36 597 7-(2,5-diazabicyclo[2.2.2]oct-2-yl)-3-(7- 196-215 387.1 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one (DR) 36 598 7-(5,8-diazaspiro[3.5]non-8-yl)-3-(8-fluoro-6- 244-254 419.1 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 599 7-(6,9-diazaspiro[4.5]dec-9-yl)-3-(8-fluoro-6- 236-242 433.1 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 36 600 7-(2,5-diazabicyclo[2.2.2]oct-2-yl)-3-(8-fluoro-6- 246-256 405.2 methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 65 601 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)- ND 377.1 pyrrolidin-3-yloxy]-2H-chromen-2-one 32 602 3-(1-benzofuran-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one 208-211 347.1 32 603 3-(1-benzofuran-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H- 192-194 361.2 chromen-2-one 32 604 3-(1-benzofuran-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1- 191-193 375.2 yl]-2H-chromen-2-one 67 605 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R,5S)- 229-232 418.3 3,4,5-trimethylpiperazin-1-yl]-2H-chromen-2-one 67 606 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3,4- 220-221 404.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 44* 607 7-(1,4-diazepan-1-yl)-3-[6-methyl-8- >300 444.2 (trifluoromethyl)imidazo[1,2-a]pyrazin-2-yl]-2H-chromen-2-one 56 608 7-(1,4-diazepan-1-yl)-3-(6,8-dimethylimidazo[1,2- 248-250 408.2 a]pyrazin-2-yl)-5-fluoro-2H-chromen-2-one 43 609 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(6- ND 402 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 65 610 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)- 220-230 363 pyrrolidin-3-yloxy]-2H-chromen-2-one 36 611 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(8aR)- 296-306 419.2 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2- one 36 612 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7- 268-275 433.2 (octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 36 613 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(8- 267-274 419.2 methyl-3,8-diazabicyclo[3.2.1]oct-3-yl)-2H-chromen-2-one 56 614 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-5-fluoro-7-(4- 223-225 422.1 methyl-1,4-diazepan-1-yl)-2H-chromen-2-one 43 615 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[methyl(1- 182-184 404.2 methylpyrrolidin-3-yl)amino]-2H-chromen-2-one 43 616 7-[(1-benzylpyrrolidin-3-yl)(methyl)amino]-3-(6,8- 150-152 480.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 53* 617 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6- 225-227 390.1 methylimidazo[1,2-b]pyridazin-2-yl)-2H-chromen-2-one 67 618 7-(4-ethyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2- ND 404.2 a]pyrazin-2-yl)-2H-chromen-2-one 48 619 7-(azetidin-3-ylamino)-3-(6,8-dimethylimidazo[1,2- 250-256 362.1 a]pyrazin-2-yl)-2H-chromen-2-one 49* 620 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7- 192-202 390.1 {methyl[(3S)-pyrrolidin-3-yl]amino}-2H-chromen-2-one 67 621 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 215-217 404.2 ethylpiperazin-1-yl)-2H-chromen-2-one 67 622 7-(4-ethylpiperazin-1-yl)-3-(6-methylimidazo[1,2- 242-255 390.1 a]pyrazin-2-yl)-2H-chromen-2-one 43 623 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(6- 225-227 374 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 53 624 3-(6-methylimidazo[1,2-b]pyridazin-2-yl)-7-[(3S)-3- 208-212 376 methylpiperazin-1-yl]-2H-chromen-2-one 43 625 7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(6- 240-245 402 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67* 626 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4- 208-209 418.1 ethyl-3-methylpiperazin-1-yl]-2H-chromen-2-one 67 627 7-[(3S)-4-ethyl-3-methylpiperazin-1-yl]-3-(6- 205-208 404.1 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 628 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(6- 256-258 390.1 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 61 629 7-[(3S)-3-methylpiperazin-1-yl]-3-(thieno[3,2-c]pyridin-2- ND 378.2 yl)-2H-chromen-2-one 61* 630 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(thieno[3,2- 163-165 392.3 c]pyridin-2-yl)-2H-chromen-2-one 53 631 7-(1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-b]pyridazin- 252-255 376 2-yl)-2H-chromen-2-one 43 632 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(8aR)- 255-258 416.1 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 43 633 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(octahydro- 225-227 430.1 2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 43 634 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(8aS)- 261-263 416.1 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 43 635 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(octahydro-2H- 275-277 416.1 pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 58 636 7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(1- 170-173 401.1 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 58 637 7-[(3R)-3-methylpiperazin-1-yl]-3-(3-methylpyrrolo[1,2- 220-223 375.2 a]pyrazin-7-yl)-2H-chromen-2-one 58 638 7-(1,4-diazepan-1-yl)-3-(3-methylpyrrolo[1,2-a]pyrazin-7- 178-181 375.2 yl)-2H-chromen-2-one 60 639 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(2- 105-108 389.1 methylpyrrolo[1,2-b]pyridazin-6-yl)-2H-chromen-2-one 67 640 7-(4-ethylpiperazin-1-yl)-3-(3-methylpyrrolo[1,2- 208-210 389.3 a]pyrazin-7-yl)-2H-chromen-2-one 60* 641 3-(2-methylpyrrolo[1,2-b]pyridazin-6-yl)-7-(piperazin-1- 213-216 361.1 yl)-2H-chromen-2-one 58 642 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(1- 175-178 401.1 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 58 643 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(3- 182-184 401.1 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 58 644 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(4- 127-131 389.5 methylpiperazin-1-yl)-2H-chromen-2-one 58 645 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(1,3- 170-173 403.1 dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 58 646 3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-(octahydro-2H- 218-221 415.1 pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 58 647 7-[(3S)-3-methylpiperazin-1-yl]-3-(3-methylpyrrolo[1,2- 202-204 375.3 a]pyrazin-7-yl)-2H-chromen-2-one 43 648 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(6,8- ND 388.5 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 34 649 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(2- 295-297 402.5 methylimidazo[1,2-a]pyrimidin-6-yl)-2H-chromen-2-one 34 650 3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-7-[(3R)-3- ND 376.5 methylpiperazin-1-yl]-2H-chromen-2-one 34* 651 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(2- 231-233 401.5 methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one 34 652 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-[(3R)-3- ND 375.5 methylpiperazin-1-yl]-2H-chromen-2-one 34 653 7-(4-methyl-1,4-diazepan-1-yl)-3-(2-methylimidazo[1,2- 175-178 389.5 a]pyridin-6-yl)-2H-chromen-2-one 67 654 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(2- 231-233 420.2 hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one 43 655 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)- 259-269 416.1 octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one 67 656 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7- 178-184 404.1 {methyl[(3S)-1-methylpyrrolidin-3-yl]amino}-2H- chromen-2-one 67 657 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3S)-1- 223-233 390.1 methylpyrrolidin-3-yl]amino}-2H-chromen-2-one 67 658 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)- 232 (S), 430.1 1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H- 248-250 chromen-2-one 67 659 7-[(3S)-3,4-dimethylpiperazin-1-yl]-5-fluoro-3-(6- ND 408.5 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 660 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(2- 280-282 390.5 methylimidazo[1,2-a]pyrimidin-6-yl)-2H-chromen-2-one 67 661 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(2- 206-209 389.5 methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one 34 662 7-(4-methyl-1,4-diazepan-1-yl)-3-(2-methylimidazo[1,2- 286-289 390.5 a]pyrimidin-6-yl)-2H-chromen-2-one 34 663 7-(1,4-diazepan-1-yl)-3-(2-methylimidazo[1,2-a]pyridin-6- 222-225 375.1 yl)-2H-chromen-2-one 34 664 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-[(3S)-3- ND 375.2 methylpiperazin-1-yl]-2H-chromen-2-one 43 665 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3- 211-215 404.2 ethylpiperazin-1-yl)-2H-chromen-2-one 58 666 7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-3-(3- 200-204 389.1 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 67 667 7-(4-ethyl-1,4-diazepan-1-yl)-3-(3-methylpyrrolo[1,2- 130-133 403.1 a]pyrazin-7-yl)-2H-chromen-2-one 58 668 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3R)-3- 205-209 389.1 methylpiperazin-1-yl]-2H-chromen-2-one 58 669 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(8aR)- 170-173 415.1 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 58 670 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(piperazin-1- 186-189 375.1 yl)-2H-chromen-2-one 67 671 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(4-ethyl-1,4- 166-169 417.1 diazepan-1-yl)-2H-chromen-2-one 67 672 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3,4- 211-215 404.1 dimethylpiperazin-1-yl]-2H-chromen-2-one 58 673 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(8aS)- 169-173 415.6 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 67 674 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(4- 182-185 403.1 ethylpiperazin-1-yl)-2H-chromen-2-one 67 675 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(2- 205-207 389.1 methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one 67 676 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3-ethyl-4- 258-262 418.1 methylpiperazin-1-yl)-2H-chromen-2-one 34 677 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-(piperazin-1-yl)- ND 361.1 2H-chromen-2-one 34 678 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-(4- 235-238 375.2 methylpiperazin-1-yl)-2H-chromen-2-one 67 679 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-4- 207-209 418.5 ethyl-3-methylpiperazin-1-yl]-2H-chromen-2-one 58 680 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3S)-3- 162-165 389.1 methylpiperazin-1-yl]-2H-chromen-2-one 58 681 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(4-methyl- ND 403.1 1,4-diazepan-1-yl)-2H-chromen-2-one 58 682 7-(1,4-diazepan-1-yl)-3-(1,3-dimethylpyrrolo[1,2- 187-190 389.5 a]pyrazin-7-yl)-2H-chromen-2-one 58 683 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(octahydro- 145-148 429.1 2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 684 7-[4-(2-hydroxyethyl)piperazin-1-yl]-3-(3- 212-215 405.4 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 67 685 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(2- 160-164 419.1 hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one 43 686 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)- 250-260 402.1 hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H-chromen-2- one 43 687 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aS,6aS)- 243-253 402.1 hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl]-2H-chromen-2-one 67 688 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)- 256-264 416.5 5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H- chromen-2-one 67 689 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aS,6aS)- 241-248 416.1 5-methylhexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl]-2H- chromen-2-one 43 690 7-[(3R)-3-(dimethylamino)pyrrolidin-1-yl]-3-(6,8- 239-242 404.2 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 43 691 7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-3-(6,8- 244-246 404.2 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 68 692 3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(propan-2- 221-225 403.1 yl)piperazin-1-yl]-2H-chromen-2-one 58 693 7-[(3R)-3-(dimethylamino)pyrrolidin-1-yl]-3-(3- 206-208 389.5 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 67 694 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3S)-4- 173-175 417.1 ethyl-3-methylpiperazin-1-yl]-2H-chromen-2-one 35 695 3-(2-methyl-1,3-benzoxazol-6-yl)-7-(piperazin-1-yl)-2H- 200-205 362.5 chromen-2-one 67 696 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(1S,4S)-5- 219-226 402.1 methyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H-chromen-2-one 58 697 7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-3-(1,3- 195-198 403.1 dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 63* 698 3-(5-methylfuro[3,2-b]pyridin-2-yl)-7-(4-methylpiperazin- 178-180 376 1-yl)-2H-chromen-2-one 45 699 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)- 265-268 410.1 3-methylpiperazin-1-yl]-2H-chromen-2-one 49 700 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7- 192-202 390.5 {methyl[(3R)-pyrrolidin-3-yl]amino}-2H-chromen-2-one 36 701 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-methyl-8- 290-300 434.5 nitroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 48 702 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3-exo)-9- 279-287 444.1 methyl-9-azabicyclo[3.3.1]non-3-yl]amino}-2H-chromen-2-one 36 703 3-(6-methyl-8-nitroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3- 251-259 420 methylpiperazin-1-yl]-2H-chromen-2-one 67 704 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aR)- 255-263 416.5 1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-2H- chromen-2-one 62* 705 3-(2,4-dimethylthieno[2,3-d]pyrimidin-6-yl)-7-(piperazin- 275 (D) 393.1 1-yl)-2H-chromen-2-one 67 706 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aS,6aS)- 252-262 416.1 1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-2H- chromen-2-one 67 707 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7- 179-186 404.5 {methyl[(3R)-1-methylpyrrolidin-3-yl]amino}-2H- chromen-2-one 58 708 7-[(3R)-3-(dimethylamino)pyrrolidin-1-yl]-3-(1,3- 155-158 403.1 dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 68 709 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(propan-2- 173-176 417.1 yl)piperazin-1-yl]-2H-chromen-2-one 45 710 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(8aR)- 268-272 436.1 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 45 711 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(8aS)- 260-262 436.1 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 45* 712 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 212-218 424 methyl-1,4-diazepan-1-yl)-2H-chromen-2-one 45 713 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)- 235-238 410.1 3-methylpiperazin-1-yl]-2H-chromen-2-one 58 714 7-(4-aminopiperidin-1-yl)-3-(1,3-dimethylpyrrolo[1,2- ND 389.1 a]pyrazin-7-yl)-2H-chromen-2-one 67 715 7-[4-(dimethylamino)piperidin-1-yl]-3-(1,3- 192-195 417.1 dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 67 716 7-[4-(dimethylamino)piperidin-1-yl]-3-(3- 224-227 403.1 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 34 717 7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-3-(2- 230-234 389.1 methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one 43 718 7-[(3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-3- 282-292 388.5 (6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 43 719 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)- 282-291 402.1 octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one 63 720 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(5- 179-183 390.3 methylfuro[3,2-b]pyridin-2-yl)-2H-chromen-2-one 63 721 7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(5- 195-198 402.3 methylfuro[3,2-b]pyridin-2-yl)-2H-chromen-2-one 63 722 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(5- 228-230 402.3 methylfuro[3,2-b]pyridin-2-yl)-2H-chromen-2-one 64* 723 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(piperazin-1-yl)- 218-220 376 2H-chromen-2-one 58 724 tert-butyl {(3S)-1-[3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7- 193-196 475.1 yl)-2-oxo-2H-chromen-7-yl]pyrrolidin-3-yl}carbamate 67 725 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3S)-3- 217-220 417.1 (propan-2-ylamino)pyrrolidin-1-yl]-2H-chromen-2-one 67 726 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)- 250-252 424 3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one 67 727 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)- 251-253 424 3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one 58 728 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-{[(1R,5S)-9- 235-238 443.1 methyl-9-azabicyclo[3.3.1]non-3-yl]amino}-2H-chromen-2-one 67 729 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3aS,6aS)-1- 173-175 415.1 methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-2H- chromen-2-one 67 730 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1- 226-233 390.5 methylpyrrolidin-3-yl]amino}-2H-chromen-2-one 67 731 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1- 209-215 404.1 ethylpyrrolidin-3-yl]amino}-2H-chromen-2-one 67 732 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-(2- 211-219 420.1 hydroxyethyl)pyrrolidin-3-yl]amino}-2H-chromen-2-one 68 733 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1- 200-207 418.1 (propan-2-yl)pyrrolidin-3-yl]amino}-2H-chromen-2-one 58 734 7-[(3R,4R)-3-(dimethylamino)-4-hydroxypyrrolidin-1-yl]- 173-176 419.1 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 67 735 7-[3-(diethylamino)pyrrolidin-1-yl]-3-(1,3- 165-168 431.1 dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 43 736 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3,3- ND 404.2 dimethylpiperazin-1-yl)-2H-chromen-2-one 67 737 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3,3,4- 185-187 418.2 trimethylpiperazin-1-yl)-2H-chromen-2-one 43 738 7-[(3S,4S)-3-(dimethylamino)-4-hydroxypyrrolidin-1-yl]- 270-272 420.2 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 43 739 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3′S,4′S)-4′- 273-275 446.1 hydroxy-1,3′-bipyrrolidin-1′-yl]-2H-chromen-2-one 50* 740 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1,2,3,6- 205-211 373.1 tetrahydropyridin-4-yl)-2H-chromen-2-one 67 741 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)- 258-268 446.1 5-(2-hydroxyethyl)hexahydropyrrolo[3,4-c]pyrrol-2(1H)- yl]-2H-chromen-2-one 51* 742 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4- 224-229 375.1 yl)-2H-chromen-2-one 67 743 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)- 249-258 444.1 5-(propan-2-yl)hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]- 2H-chromen-2-one 58 744 7-(2,5-diazabicyclo[2.2.1]hept-2-yl)-3-(3- ND 373.4 methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 64 745 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(8aS)- 203-205 416.2 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 67 746 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 232-234 422.1 ethylpiperazin-1-yl)-5-fluoro-2H-chromen-2-one 67 747 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)- 231-237 430.5 5-ethylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H- chromen-2-one 67 748 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1- ND 389.1 methylpiperidin-4-yl)-2H-chromen-2-one 67 749 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1- 218-223 403.5 ethylpiperidin-4-yl)-2H-chromen-2-one 67 750 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(2- 207-212 419.1 hydroxyethyl)piperidin-4-yl]-2H-chromen-2-one 58 751 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3′R,4′R)-4′- 264-268 445.1 hydroxy-1,3′-bipyrrolidin-1′-yl]-2H-chromen-2-one 58 752 7-(4-cyclopropylpiperazin-1-yl)-3-(1,3- ND 415.1 dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 68 753 3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(propan-2-yl)- ND 417.1 1,4-diazepan-1-yl]-2H-chromen-2-one 68 754 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(propan-2- 115-118 431.1 yl)-1,4-diazepan-1-yl]-2H-chromen-2-one 67 755 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3aR,6aR)- 196-198 415.1 1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-2H- chromen-2-one 67 756 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3aR,6aS)-5- 146-150 415.1 methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H- chromen-2-one 58 757 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[3- 118-122 445.1 (morpholin-4-yl)pyrrolidin-1-yl]-2H-chromen-2-one 43 758 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(7R,8aS)-7- 285-287 432.4 hydroxyhexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H- chromen-2-one 67 759a 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8-methoxy-6- NI NI methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 760a 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8-hydroxy-6- NI NI methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 43 761 7-[(1R,5S,6s)-6-(dimethylamino)-3-azabicyclo[3.1.0]hex- 271-274 416.1 3-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H- chromen-2-one 43 762 7-(4-cyclopropylpiperazin-1-yl)-3-(6,8- 263-266 416.1 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 64 763 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(4- 229-232 390.3 methylpiperazin-1-yl)-2H-chromen-2-one 45 764 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 217-220 410 methylpiperazin-1-yl)-2H-chromen-2-one 45 765 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)- 210-215 424.1 3-(dimethylamino)pyrrolidin-1-yl]-2H-chromen-2-one 67 766 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 228-230 424.1 ethylpiperazin-1-yl)-2H-chromen-2-one 58 767 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(7R,8aS)-7- 185-188 431.1 hydroxyhexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H- chromen-2-one 68 768 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3S)-3- 153-156 431.1 methyl-4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one 35* 769 3-(2-methyl-1,3-benzothiazol-6-yl)-7-(4-methylpiperazin- 215-217 392.4 1-yl)-2H-chromen-2-one 35 770 3-(2-methyl-1,3-benzothiazol-6-yl)-7-[(3S)-3- ND 392.4 methylpiperazin-1-yl]-2H-chromen-2-one 35 771 7-(1,4-diazepan-1-yl)-3-(2-methyl-1,3-benzothiazol-6-yl)- 228-230 392.4 2H-chromen-2-one 43 772 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3- ND 404.4 ethylpiperazin-1-yl]-2H-chromen-2-one 68* 773 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(propan- 206-211 417.5 2-yl)piperidin-4-yl]-2H-chromen-2-one 67 774 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[4-(2- 203-205 420.3 hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one 64 775 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(4-methyl-1,4- 243-245 404.3 diazepan-1-yl)-2H-chromen-2-one 67 776a 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(2-methyl-1,3- NI NI benzothiazol-6-yl)-2H-chromen-2-one 67 777a 7-[(3S)-4-ethyl-3-methylpiperazin-1-yl]-3-(2-methyl-1,3- NI NI benzothiazol-6-yl)-2H-chromen-2-one 67 778a 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3- NI NI ethyl-4-methylpiperazin-1-yl]-2H-chromen-2-one 67 779a 7-[(3S)-3,4-diethylpiperazin-1-yl]-3-(6,8- NI NI dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 45 780 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7- ND 408 [(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H-chromen-2-one 43 781 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)- 246-252 416.1 octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one 67 782 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)- ND 430.1 1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H- chromen-2-one 58 783 7-(2,5-diazabicyclo[2.2.1]hept-2-yl)-3-(1,3- 236-239 387.1 dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 58 784 7-[4-(aminomethyl)piperidin-1-yl]-3-(1,3- 256-259 403.1 dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one 67 785 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)- 207-217 460.6 1-(2-hydroxyethyl)octahydro-6H-pyrrolo[3,4-b]pyridin-6- yl]-2H-chromen-2-one 67 786 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)- 215-221 444.5 1-ethyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H- chromen-2-one 67 787 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7- ND 422 [(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H- chromen-2-one 67 788 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(4- 196-198 404.3 ethylpiperazin-1-yl)-2H-chromen-2-one 68 789 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[4-(propan-2- 186-189 418.2 yl)piperazin-1-yl]-2H-chromen-2-one 67 790 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-{4-[(propan- ND 445.3 2-ylamino)methyl]piperidin-1-yl}-2H-chromen-2-one 67 791 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7- 135-138 436.3 [(1S,4S)-5-ethyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H- chromen-2-one 68 792 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(propan- 240-242 418.2 2-yl)piperazin-1-yl]-2H-chromen-2-one 67 793 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(1S,4S)-5- 133-135 416.3 ethyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H-chromen-2-one 43 794 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aS,7aS)- 246-253 416.3 octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one 67 795 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aS,7aS)- ND 430.3 1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H- chromen-2-one 67 796 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aS,7aS)- 200-210 460.3 1-(2-hydroxyethyl)octahydro-6H-pyrrolo[3,4-b]pyridin-6- yl]-2H-chromen-2-one 67 797 7-[(3R,5S)-4-ethyl-3,5-dimethylpiperazin-1-yl]-3-(6- ND 418.2 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 64 798 7-(4-cyclopropylpiperazin-1-yl)-3-(5,7-dimethylfuro[2,3- ND 416.2 c]pyridin-2-yl)-2H-chromen-2-one 68 799 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[4-(2- 235-237 434.2 methoxyethyl)piperazin-1-yl]-2H-chromen-2-one 67 800 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1-methyl- ND 387.2 1,2,3,6-tetrahydropyridin-4-yl)-2H-chromen-2-one 67 801 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(2- 172-214 417.3 hydroxyethyl)-1,2,3,6-tetrahydropyridin-4-yl]-2H- (DR) chromen-2-one 68 802 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(propan- 207-217 415.2 2-yl)-1,2,3,6-tetrahydropyridin-4-yl]-2H-chromen-2-one 67 803 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aS,7aS)- 217-221 444.3 1-ethyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H- chromen-2-one 64 804 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(3S)-3- 253-257 390.2 methylpiperazin-1-yl]-2H-chromen-2-one 67 805 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(3S)-3,4- 200-205 404.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 64 806 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(3R)-3- 251-256 390.2 methylpiperazin-1-yl]-2H-chromen-2-one 67 807 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(3R)-3,4- 199-204 404.3 dimethylpiperazin-1-yl]-2H-chromen-2-one 43 808 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3- ND 418.2 (propan-2-yl)piperazin-1-yl]-2H-chromen-2-one 67 809 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4- ND 432.3 methyl-3-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one 67 810 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4- ND 446.3 ethyl-3-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one 43 811 7-(4-cyclopropylpiperazin-1-yl)-3-(6-methylimidazo[1,2- 287-289 402.5 a]pyrazin-2-yl)-2H-chromen-2-one 43 812 7-(4-tert-butylpiperazin-1-yl)-3-(6,8-dimethylimidazo[1,2- 270-272 432.3 a]pyrazin-2-yl)-2H-chromen-2-one 67 813 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3R)-3- ND 431.2 methyl-4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one 67 814 7-(4-cyclobutylpiperazin-1-yl)-3-(1,3-dimethylpyrrolo[1,2- 217-220 429.2 a]pyrazin-7-yl)-2H-chromen-2-one 67 815 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(4- 259-262 418.1 propylpiperazin-1-yl)-2H-chromen-2-one 67 816 7-[4-(cyclopropylmethyl)piperazin-1-yl]-3-(5,7- ND 430.3 dimethylfuro[2,3-c]pyridin-2-yl)-2H-chromen-2-one 62 817 3-(4,6-dimethylthieno[3,2-c]pyridin-2-yl)-7-(piperazin-1- ND 392.1 yl)-2H-chromen-2-one 76* 818 7-(2-methylimidazo[1,2-a]pyridin-6-yl)-3-(piperazin-1-yl)- 174-178 361.3 2H-chromen-2-one 67 819 3-(4,6-dimethylthieno[3,2-c]pyridin-2-yl)-7-(4- ND 406.2 methylpiperazin-1-yl)-2H-chromen-2-one 67 820 3-(4,6-dimethylthieno[3,2-c]pyridin-2-yl)-7-[4-(2- ND 450.3 methoxyethyl)piperazin-1-yl]-2H-chromen-2-one 67 821 7-(1-cyclobutylpiperidin-4-yl)-3-(6,8-dimethylimidazo[1,2- 200-205 429.4 a]pyrazin-2-yl)-2H-chromen-2-one 67 822 7-(4-cyclobutylpiperazin-1-yl)-3-(6,8- 260-262 430.2 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 823 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(oxetan- 230-235 432.3 3-yl)piperazin-1-yl]-2H-chromen-2-one 43 824 3-(8-ethyl-6-methylimidazo[1,2-a]pyrazin-2-yl)-7- ND 390.3 (piperazin-1-yl)-2H-chromen-2-one 69* 825 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-(piperidin-4-yl)- ND 360.3 2H-chromen-2-one 67 826 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-(1- 204-206 374.2 methylpiperidin-4-yl)-2H-chromen-2-one 67 827 7-(1-ethylpiperidin-4-yl)-3-(2-methylimidazo[1,2- 268-270 388.3 a]pyridin-6-yl)-2H-chromen-2-one 67 828 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-[1-(oxetan-3- 198-200 416.3 yl)piperidin-4-yl]-2H-chromen-2-one 67 829 7-[1-(2-hydroxyethyl)piperidin-4-yl]-3-(2- 222-226 404.3 methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one 67 830 3-(8-ethyl-6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4- 210-215 404.2 methylpiperazin-1-yl)-2H-chromen-2-one 64 831 3-(4,6-dimethylfuro[3,2-c]pyridin-2-yl)-7-(piperazin-1-yl)- ND 376.3 2H-chromen-2-one 67 832 3-(4,6-dimethylfuro[3,2-c]pyridin-2-yl)-7-(4- ND 390.2 methylpiperazin-1-yl)-2H-chromen-2-one 67 833 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(propan-2- 275-280 404.3 yl)piperazin-1-yl]-2H-chromen-2-one 69 834 3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-7-(piperidin-4- 280-281 361.3 yl)-2H-chromen-2-one 67 835 3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-7-(1- 300-302 375.3 methylpiperidin-4-yl)-2H-chromen-2-one 67 836 7-(1-ethylpiperidin-4-yl)-3-(2-methylimidazo[1,2- 288-290 389.3 a]pyrimidin-6-yl)-2H-chromen-2-one 67 837 7-[4-(2-hydroxyethyl)piperazin-1-yl]-3-(6- 246-252 406.3 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 838 7-(4-cyclobutylpiperazin-1-yl)-3-(6-methylimidazo[1,2- 268-274 416.2 a]pyrazin-2-yl)-2H-chromen-2-one 67 839 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(oxetan-3- 273-276 418.2 yl)piperazin-1-yl]-2H-chromen-2-one 67 840 3-(4,6-dimethylfuro[3,2-c]pyridin-2-yl)-7-[4-(propan-2- 186-191 418.2 yl)piperazin-1-yl]-2H-chromen-2-one 67 841 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(1- 266-272 375.3 methylpiperidin-4-yl)-2H-chromen-2-one 67 842 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1- 208-212 417.3 propylpiperidin-4-yl)-2H-chromen-2-one 67 843 7-[1-(2-hydroxyethyl)piperidin-4-yl]-3-(6- 230-236 405.4 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 844 7-(1-ethylpiperidin-4-yl)-3-(6-methylimidazo[1,2- 249-259 389.4 a]pyrazin-2-yl)-2H-chromen-2-one 70* 845 3-[2-methyl-3-(1,2,3,6-tetrahydropyridin-4-yl)imidazo[1,2- ND 440.5 b]pyridazin-6-yl]-7-(1,2,3,6-tetrahydropyridin-4-yl)-2H- chromen-2-one 77* 846 7-[(dimethylamino)methyl]-3-(6,8-dimethylimidazo[1,2- 192-196 349.3 a]pyrazin-2-yl)-2H-chromen-2-one 77 847 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-1- 191-193 389.4 ylmethyl)-2H-chromen-2-one 77 848 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1- 189-195 390.4 ylmethyl)-2H-chromen-2-one 77 849 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4- 220-223 404.4 methylpiperazin-1-yl)methyl]-2H-chromen-2-one 77 850 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(propan-2- 285-291 363.4 ylamino)methyl]-2H-chromen-2-one 77 851 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1H- 286-292 372.3 imidazol-1-ylmethyl)-2H-chromen-2-one 67 852 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-ethyl-3- 203-205 418.4 methylpiperazin-1-yl)-2H-chromen-2-one 73* 853 3-(4,6-dimethylpyrazolo[1,5-a]pyrazin-2-yl)-7-(1- ND 403.3 ethylpiperidin-4-yl)-2H-chromen-2-one 67 854 7-(1-cyclopropylpiperidin-4-yl)-3-(6,8- 236-243 415.4 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 855 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(oxetan- 217-223 431.4 3-yl)piperidin-4-yl]-2H-chromen-2-one 69 856 3-(2-methyl-2H-indazol-5-yl)-7-(piperidin-4-yl)-2H- 232-238 360.3 chromen-2-one 77 857 7-[3-(dimethylamino)propyl]-3-(6,8-dimethylimidazo[1,2- 194-196 377.3 a]pyrazin-2-yl)-2H-chromen-2-one 77 858 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(propan- 184-187 391.3 2-ylamino)propyl]-2H-chromen-2-one 77 859 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3- 145-153 418.4 (piperazin-1-yl)propyl]-2H-chromen-2-one 77 860 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(4- 219-223 432.4 methylpiperazin-1-yl)propyl]-2H-chromen-2-one 67 861 7-[1-(2-hydroxyethyl)piperidin-4-yl]-3-(2-methyl-2H- 220-226 404.3 indazol-5-yl)-2H-chromen-2-one 67 862 3-(2-methyl-2H-indazol-5-yl)-7-(1-methylpiperidin-4-yl)- 215-218 374.2 2H-chromen-2-one 67 863 7-(1-ethylpiperidin-4-yl)-3-(2-methyl-2H-indazol-5-yl)- 196-198 388.3 2H-chromen-2-one 77 864 7-[2-(dimethylamino)ethyl]-3-(6,8-dimethylimidazo[1,2- 219-223 363.4 a]pyrazin-2-yl)-2H-chromen-2-one 77 865 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(propan- 192-197 377.3 2-ylamino)ethyl]-2H-chromen-2-one 77 866 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2- 186-188 404.3 (piperazin-1-yl)ethyl]-2H-chromen-2-one 67 867 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(1- 165-168 405.3 methylpiperidin-4-yl)oxy]-2H-chromen-2-one 51 868 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4-yl)- 247-253 361.3 2H-chromen-2-one 67 869 7-(1-cyclobutylpiperidin-4-yl)-3-(6-methylimidazo[1,2- 256-268 415.5 a]pyrazin-2-yl)-2H-chromen-2-one 77 870 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2- ND 379.2 hydroxyethyl)amino]ethyl}-2H-chromen-2-one 77 871 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2- 168-172 393.3 hydroxyethyl)(methyl)amino]ethyl}-2H-chromen-2-one 77 872 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(1- 203-206 393.3 hydroxypropan-2-yl)amino]ethyl}-2H-chromen-2-one 77 873 7-{2-[(1,3-dihydroxypropan-2-yl)amino]ethyl}-3-(6,8- 217-221 409.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 77 874 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2R)-2- 166-171 419.4 (hydroxymethyl)pyrrolidin-1-yl]ethyl}-2H-chromen-2-one 77 875 7-{2-[bis(2-hydroxyethyl)amino]ethyl}-3-(6,8- 184-188 423.4 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 74* 876 7-[2-(dimethylamino)ethoxy]-3-(6,8-dimethylimidazo[1,2- 251-253 379.3 a]pyrazin-2-yl)-2H-chromen-2-one 74 877 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(propan- 202-207 393.3 2-ylamino)ethoxy]-2H-chromen-2-one 67 878 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(oxetan-3- ND 417.3 yl)piperidin-4-yl]-2H-chromen-2-one 77 879 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(2- ND 393.3 hydroxyethyl)amino]propyl}-2H-chromen-2-one 77 880 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(2- 173-176 407.3 hydroxyethyl)(methyl)amino]propyl}-2H-chromen-2-one 77 881 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(1- 181-184 407.3 hydroxypropan-2-yl)amino]propyl}-2H-chromen-2-one 77 882 7-{3-[(1,3-dihydroxypropan-2-yl)amino]propyl}-3-(6,8- 195-199 423.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 77 883 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(2R)-2- 182-185 433.3 (hydroxymethyl)pyrrolidin-1-yl]propyl}-2H-chromen-2-one 77 884 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3- 168-172 419.3 (morpholin-4-yl)propyl]-2H-chromen-2-one 77 885 7-{3-[bis(2-hydroxyethyl)amino]propyl}-3-(6,8- 158-162 437.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 77 886 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2- 180-184 405.3 (morpholin-4-yl)ethyl]-2H-chromen-2-one 67 887 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(1- ND 403.4 propylpiperidin-4-yl)-2H-chromen-2-one 67 888 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-(2- ND 434.4 hydroxyethyl)-3-methylpiperazin-1-yl]-2H-chromen-2-one 67 889 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1- 195-202 391.2 methylpyrrolidin-3-yl]oxy}-2H-chromen-2-one 67 890 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1- 193-195 405.3 ethylpyrrolidin-3-yl]oxy}-2H-chromen-2-one 67 891 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1- 176-179 419.3 (propan-2-yl)pyrrolidin-3-yl]oxy}-2H-chromen-2-one 67 892 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-(2- 190-196 421.2 hydroxyethyl)pyrrolidin-3-yl]oxy}-2H-chromen-2-one 67 893 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-(1- 196-202 435.4 hydroxypropan-2-yl)pyrrolidin-3-yl]oxy}-2H-chromen-2-one 68 894 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-(2- 192-195 436.4 fluoroethyl)-3-methylpiperazin-1-yl]-2H-chromen-2-one 74 895 7-[2-(diethylamino)ethoxy]-3-(6,8-dimethylimidazo[1,2- 175-177 407.3 a]pyrazin-2-yl)-2H-chromen-2-one 74 896 7-{2-[bis(2-hydroxyethyl)amino]ethoxy}-3-(6,8- 199-202 439.2 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 74 897 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4- 172-177 391.3 yloxy)-2H-chromen-2-one 67 898 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(1- 175-177 419.4 ethylpiperidin-4-yl)oxy]-2H-chromen-2-one 67 899 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[1-(2- 165-168 435.3 hydroxyethyl)piperidin-4-yl]oxy}-2H-chromen-2-one 68 900 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-(3- 215-217 450.4 fluoropropyl)-3-methylpiperazin-1-yl]-2H-chromen-2-one 67 901 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[1-(propan- 185-191 433.4 2-yl)piperidin-4-yl]oxy}-2H-chromen-2-one 78* 902 7-[4-(dimethylamino)butyl]-3-(6,8-dimethylimidazo[1,2- 190-193 391.5 a]pyrazin-2-yl)-2H-chromen-2-one 78 903 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{4-[(2- 156-160 421.3 hydroxyethyl)(methyl)amino]butyl}-2H-chromen-2-one 78 904 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{4-[(2R)-2- 147-151 447.4 (hydroxymethyl)pyrrolidin-1-yl]butyl}-2H-chromen-2-one 78 905 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4- 187-191 432.4 (piperazin-1-yl)butyl]-2H-chromen-2-one 68 906 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(3- 195-200 435.3 fluoropropyl)piperidin-4-yl]-2H-chromen-2-one 68 907 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-(3- 187-190 448.4 hydroxypropyl)-3-methylpiperazin-1-yl]-2H-chromen-2-one 79* 908 7-[3-(dimethylamino)propyl]-3-(2-methylimidazo[1,2- 176-178 362.3 a]pyridin-6-yl)-2H-chromen-2-one 79 909 7-[3-(dimethylamino)propyl]-3-(8-fluoro-2- 185-188 380.4 methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one 79 910 7-[3-(dimethylamino)propyl]-3-(8-ethyl-2- 123-126 390.4 methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one 77 911 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2- 204-208 349.3 (methylamino)ethyl]-2H-chromen-2-one 77 912 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3- 197-201 363.3 (methylamino)propyl]-2H-chromen-2-one 79 913 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-[3- 163-166 366.3 (methylamino)propyl]-2H-chromen-2-one 67 914 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(2- 191-198 431.5 methylpropyl)piperidin-4-yl]-2H-chromen-2-one 67 915 7-{[1-(1,3-dihydroxypropan-2-yl)piperidin-4-yl]oxy}-3- 206-210 465.3 (6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 916 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(2- 260-270 417.3 methylpropyl)piperidin-4-yl]-2H-chromen-2-one 68 917 7-[1-(3-fluoropropyl)piperidin-4-yl]-3-(6- 224-234 421.3 methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 75* 918 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2- 201-203 405.2 (pyrrolidin-1-yl)ethoxy]-2H-chromen-2-one 43 919 7-(4-aminopiperidin-1-yl)-3-(6,8-dimethylimidazo[1,2- 262-269 390.2 a]pyrazin-2-yl)-2H-chromen-2-one 43 920 7-(4-amino-4-methylpiperidin-1-yl)-3-(6,8- 190-192 404.5 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 921 7-[4-(dimethylamino)piperidin-1-yl]-3-(6,8- 189-193 418.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 922 7-[4-(diethylamino)piperidin-1-yl]-3-(6,8- 205-207 446.4 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 923 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(propan- 216-218 432.4 2-ylamino)piperidin-1-yl]-2H-chromen-2-one 67 924 7-[4-(cyclobutylamino)piperidin-1-yl]-3-(6,8- 222-225 444.4 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 925 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{4-[(1- 185-189 448.4 hydroxypropan-2-yl)amino]piperidin-1-yl}-2H-chromen-2-one 77 926 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3- 184-186 377.3 (ethylamino)propyl]-2H-chromen-2-one 80* 927 7-(3-aminopropyl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin- 212-216 349.3 2-yl)-2H-chromen-2-one 67 928 7-{4-[bis(2-hydroxyethyl)amino]piperidin-1-yl}-3-(6,8- 209-212 478.4 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 929 7-{4-[(1,3-dihydroxypropan-2-yl)amino]piperidin-1-yl}-3- 251-256 464.4 (6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 75 930 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2- 189-193 379.4 (ethylamino)ethoxy]-2H-chromen-2-one 77 931 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(2- 147-150 407.3 methoxyethyl)amino]propyl}-2H-chromen-2-one 77 932 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3- 147-150 433.3 [(tetrahydrofuran-2-ylmethyl)amino]propyl}-2H-chromen-2-one 81* 933 7-[3-(benzylamino)propyl]-3-(6,8-dimethylimidazo[1,2- 143-147 439.3 a]pyrazin-2-yl)-2H-chromen-2-one 81 934 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3- 149-152 445.3 [(thiophen-3-ylmethyl)amino]propyl}-2H-chromen-2-one 81 935 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(pyridin- 177-180 440.4 2-ylmethyl)amino]propyl}-2H-chromen-2-one 81 936 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(pyridin- 155-159 440.4 4-ylmethyl)amino]propyl}-2H-chromen-2-one 67 937 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2- 190-196 393.3 [ethyl(methyl)amino]ethoxy}-2H-chromen-2-one 67 938 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[ethyl(2- 165-168 423.3 hydroxyethyl)amino]ethoxy}-2H-chromen-2-one 77 939 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3- 177-180 419.5 (tetrahydrofuran-3-ylamino)propyl]-2H-chromen-2-one 75 941 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(3R)-3- 195-202 421.3 hydroxypyrrolidin-1-yl]ethoxy}-2H-chromen-2-one 82 942 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(2- 220-228 444.4 methylpiperidin-1-yl)azetidin-1-yl]-2H-chromen-2-one 82* 943 7-[3-(dimethylamino)azetidin-1-yl]-3-(6,8- 246-250 390.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 82 944 7-[3-(diethylamino)azetidin-1-yl]-3-(6,8- 218-220 418.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 82 945 7-(2,7-diazaspiro[4.4]non-2-yl)-3-(6,8- 190-200 416.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 75 946 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(2-{[(2R)-1- 185-188 409.3 hydroxypropan-2-yl]amino}ethoxy)-2H-chromen-2-one 75 947 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(2-{[(2S)-1- 186-188 409.3 hydroxypropan-2-yl]amino}ethoxy)-2H-chromen-2-one 71* 948 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(2R)- 172-174 391.3 pyrrolidin-2-ylmethoxy]-2H-chromen-2-one 50 949 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(2,2,6,6- 188-190 429.3 tetramethyl-1,2,3,6-tetrahydropyridin-4-yl)-2H-chromen-2-one 82 950 7-[(3R)-3-(aminomethyl)pyrrolidin-1-yl]-3-(6,8- 196-198 390.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 82 951 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3- 284-286 430.3 (piperidin-1-yl)azetidin-1-yl]-2H-chromen-2-one 78 952 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4- 180-184 377.3 (methylamino)butyl]-2H-chromen-2-one 75 953 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2- 178-190 419.3 (piperidin-1-yl)ethoxy]-2H-chromen-2-one 75 954 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(3S)-3- ND 421.3 hydroxypyrrolidin-1-yl]ethoxy}-2H-chromen-2-one 75 955 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(1- 187-191 423.3 hydroxy-2-methylpropan-2-yl)amino]ethoxy}-2H- chromen-2-one 75 956 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2- 175-177 421.3 (morpholin-4-yl)ethoxy]-2H-chromen-2-one 75 957 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(4- 187-190 435.4 hydroxypiperidin-1-yl)ethoxy]-2H-chromen-2-one 72* 958 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1-ethyl-4- 162-164 421.3 fluoropiperidin-4-yl)-2H-chromen-2-one 75 959 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2- 175-177 395 hydroxyethyl)amino]ethoxy}-2H-chromen-2-one 75 960 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2- ND 409.3 methoxyethyl)amino]ethoxy}-2H-chromen-2-one 75 961 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2- 185-188 409.3 hydroxypropyl)amino]ethoxy}-2H-chromen-2-one 68 962 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(2- 212-214 448.3 hydroxy-2-methylpropyl)piperazin-1-yl]-2H-chromen-2-one 82 963 7-[3-(aminomethyl)azetidin-1-yl]-3-(6,8- ND 376.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 82 964 7-[(3S)-3-(aminomethyl)pyrrolidin-1-yl]-3-(6,8- ND 390.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 965 7-{(3R)-3-[(dimethylamino)methyl]pyrrolidin-1-yl}-3- 206-208 418.4 (6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 966 7-{3-[(dimethylamino)methyl]azetidin-1-yl}-3-(6,8- 150-152 404.4 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 967 7-{(3S)-3-[(dimethylamino)methyl]pyrrolidin-1-yl}-3-(6,8- 198-200 418.4 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 77 968 7-[2-(diethylamino)ethyl]-3-(6,8-dimethylimidazo[1,2- 190-193 391.3 a]pyrazin-2-yl)-2H-chromen-2-one 77 969 7-[3-(diethylamino)propyl]-3-(6,8-dimethylimidazo[1,2- 165-168 405.4 a]pyrazin-2-yl)-2H-chromen-2-one 78 970 7-[4-(diethylamino)butyl]-3-(6,8-dimethylimidazo[1,2- 212-216 419.4 a]pyrazin-2-yl)-2H-chromen-2-one 83* 971 7-(2,6-diazaspiro[3.3]hept-2-yl)-3-(6,8- ND 388.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 67 972 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(6-methyl- ND 402.3 2,6-diazaspiro[3.3]hept-2-yl)-2H-chromen-2-one 43 973 2-[3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H- ND 430.3 chromen-7-yl]hexahydropyrrolo[1,2-a]pyrazin-6(2H)-one 43 974 1-[3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H- ND 400.3 chromen-7-yl]piperidine-4-carbonitrile 43 975 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4- ND 391.3 hydroxypiperidin-1-yl)-2H-chromen-2-one 83 976 7-(2,7-diazaspiro[3.5]non-7-yl)-3-(6,8- ND 416.5 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 83 977 7-(6-amino-2-azaspiro[3.3]hept-2-yl)-3-(6,8- ND 402.5 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one 34 978 3-(imidazo[1,2-a]pyridin-6-yl)-7-(4-methylpiperazin-1-yl)- ND 360.3 2H-chromen-2-one 34 979 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3- ND 387.3 (imidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one 34 980 3-(imidazo[1,2-a]pyridin-6-yl)-7-(piperazin-1-yl)-2H- ND 374.4 chromen-2-one 34 981 3-(imidazo[1,2-a]pyridin-6-yl)-7-[(3S)-3-methylpiperazin- ND 361.6 1-yl]-2H-chromen-2-one 70 982 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-(4- ND 393.2 methylpiperazin-1-yl)-2H-chromen-2-one 70 983 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-[(8aS)- ND 419.7 hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one 70 984 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-[(3S)-3- ND 393.7 methylpiperazin-1-yl]-2H-chromen-2-one 84* 985 7-(2,6-diazaspiro[3.3]hept-2-yl)-3-(8-fluoro-2- ND 391.7 methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one, and 70 986 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7- ND 379.7 (piperazin-1-yl)-2H-chromen-2-one;

or a salt, isotopologue, stereoisomer, racemate, enantiomer, diastereomer or tautomer thereof.

Table 2 further provides certain isolated compounds of a salt form of a compound of Formula (I) that may be prepared according to the procedures of the indicated Example by using the appropriate reactants, reagents and reaction conditions. The preparation of any free base, isotopologue, stereoisomer, racemate, enantiomer, diastereomer or tautomer from a salt form of a compound of Formula (I) is also contemplated and further included within the scope of the description herein. Where a free base form of the compound was not isolated from the salt form, a person of ordinary skill in the art could be expected to perform the required reactions to prepare and isolate the free base form of the compound.

The term “Cpd” represents Compound number, the term “Ex” represents “Example Number” (wherein * indicates that the corresponding Example for the Compound is provided above), the term “M.P.” represents “Melting Point (° C.),” the term “MS” represents “Mass Spectroscopy Peak(s) m/z [M+H]^(+/−),” the term “D” represents “Decomposition/Decomposed,” the term “DR” represents “Decomposition Range,” the term “S” represents “Softens” and the term “ND” indicates that the value was “Not Determined.”

TABLE 2 Ex Cpd Name M.P. MS  1   1 7-(piperazin-1-yl)-3[4-(trifluoromethyl)- ND 416.1 1,3-benzoxazol-2-yl]-2H-chromen-2-one trifluoroacetate  1   1a 7-(piperazin-1-yl)-3[4-(trifluoromethyl)- 339- 416.1 1,3-benzoxazol-2-yl]-2H-chromen-2-one 341 hydrochloride  1   2 7-(piperazin-1-yl)-3[7-(trifluoromethyl)- ND 416.1 1,3-benzoxazol-2-yl]-2H-chromen-2-one trifluoroacetate  1   2a 7-(piperazin-1-yl)-3[7-(trifluoromethyl)- 297- 416.1 1,3-benzoxazol-2-yl]-2H-chromen-2-one 307 hydrochloride  5*   3 2-oxo-N-phenyl-7-(piperazin-1-yl)-2H- ND 350.1 chromene-3-carboxamide trifluoroacetate  1*   4 3-(1,3-benzothiazol-2-yl)-7-(piperazin-1- 250 364.4 yl)-2H-chromen-2-one hydrochloride (D)  2*   5 3-(4-chloro-1,3-benzothiazol-2-yl)-7- 290 398.1 (piperazin-1-yl)-2H-chromen-2-one (D) hydrochloride  2   6 3-(7-chloro-1,3-benzothiazol-2-yl)-7- 320 398.1 (piperazin-1-yl)-2H-chromen-2-one (D) hydrochloride 11*  18 3-(4-chloro-1,3-benzothiazol-2-yl)-7- 339- 397.1 (piperidin-4-yl)-2H-chromen-2-one 341 hydrochloride  1  19 3-(5-fluoro-1,3-benzoxazol-2-yl)-7- 320- 366.1 (piperazin-1-yl)-2H-chromen-2-one 325 hydrochloride  1  22 3-(4-methyl-1,3-benzoxazol-2-yl)-7- 257- 362.2 (piperazin-1-yl)-2H-chromen-2-one 259 hydrochloride  1  40 3-(4-fluoro-1,3-benzoxazol-2-yl)-7- 230- 366.2 (piperazin-1-yl)-2H-chromen-2-one 232 hydrochloride 21  52 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)- ND 382.1 1,3-thiazol-2-yl]-2H-chromen-2-one trifluoroacetate 21  52a 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)- ND 382.2 1,3-thiazol-2-yl]-2H-chromen-2-one hydrochloride 21  53 7-(4-methylpiperazin-1-yl)-3-[4- 260- 396.2 (trifluoromethyl)-1,3-thiazol-2-yl]-2H- 270 chromen-2-one trifluoroacetate  3  67 3-(4-iodo-1,3-benzoxazol-2-yl)-7- 280- 474.2 (piperazin-1-yl)-2H-chromen-2-one 285 hydrochloride  3  70 3-(4-chloro-1,3-benzoxazol-2-yl)-7- 278- 382.2 (piperazin-1-yl)-2H-chromen-2-one 282 384.1 hydrochloride  1 110 3-([1,3]oxazolo[4,5-b]pyridin-2-yl)-7- 200~ 385.2 (piperazin-1-yl)-2H-chromen-2-one 300 hydrochloride (D) 38 129 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept- >300 360.2 2-yl]-3-(imidazo[1,2a]pyrimidin-2-yl)- 2H-chromen-2-one hydrochloride (1:3) 41 141 3-(3-methylimidazo[2,1-b][1,3]thiazol-6- ND 367.2 yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride (1:3) 38 186 7-(1,4-diazepan-1-yl)-3-(imidazo[1,2- >300 362.3 a]pyrimidin-2-yl)-2H-chromen-2-one hydrochloride 65 197 3-(imidazo[1,2-a]pyrimidin-2-yl)-7- >310 363.3 (piperidin-4-yloxy)-2H-chromen-2-one hydrochloride 25* 274 3-(2-methylpyrimidin-4-yl)-7-(piperazin- 200 323.2 1-yl)-2H-chromen-2-one hydrochloride (D) 25 278 3-(2-cyclopropylpyrimidin-4-yl)-7- 200- 349.4 (piperazin-1-yl)-2H-chromen-2-one 300 hydrochloride (D) 25 279 7-(piperazin-1-yl)-3-[2-(propan-2- 200- 351.4 yl)pyrimidin-4-yl]-2H-chromen-2-one 300 hydrochloride (D) 65* 321 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)- 240- 349.2 pyrrolidin-3-yloxy]-2H-chromen-2-one 250 hydrochloride (1:2) 65 322 3-(7-methylimidazo [1,2-a]pyrimidin-2- 292- 363.2 yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H- 296 chromen-2-one hydrochloride (1:2) 65 323 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7- 271- 362.3 [(3R)-pyirolidin-3-yloxy]-2H-chromen-2- 275 one hydrochloride (1:2) 65 324 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7- 252- 354.2 [(3R)-pyrrolidin-3-yloxy]-2H-chromen- 256 2-one hydrochloride (1:2) 65 325 3-(2-methylimidazo[2,1-b][1,3]thiazol-6- 230- 368.2 yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H- 235 chromen-2-one hydrochloride (1:2) 65 326 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7- 261- 362.3 [(3R)-pyrrolidin-3-yloxy]-2H-chromen-2- 265 one hydrochloride (1:2) 65 327 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)- 255- 363.3 7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen- 258 2-one hydrochloride (1:2) 38 377 7-[(1-benzylpyrrolidin-3-yl)(methyl)amino]- ND 466.4 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)- 2H-chromen-2-one acetate 67 759 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3- 227- 420.4 (8-methoxy-6-methylimidazo[1,2-a]pyrazin- 229 2-yl)-2H-chromen-2-one acetate (1:2) 67 760 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8- 304- 406.0 hydroxy-6-methylimidazo[1,2-a]pyrazin-2- 306 yl)-2H-chromen-2-one acetate 67 776 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(2- 210- 417.5 methyl-1,3-benzothiazol-6-yl)-2H- 211 chromen-2-one acetate (2:1) 67 777 7-[(3S)-4-ethyl-3-methylpiperazin-1-yl] 180- 420.2 3-(2-methyl-1,3-benzothiazol-6-yl)-2H- 182 chromen-2-one acetate 67 778 3-(6,8-dimethylimidazo [1,2-a]pyrazin- 170- 418.2 2-yl)-7-[(3S)-3-ethyl-4-methylpiperazin- 172 1-yl]-2H-chromen-2-one acetate, and 67 779 7-[(3S)-3,4-diethylpiperazin-1-yl]-3-(6,8 170- 432.3 dimethylimidazo[1,2-a]pyrazin-2-yl)-2H- 174 chromen-2-one acetate (1:2);

or a free base, isotopologue, stereoisomer, racemate, enantiomer, diastereomer or tautomer thereof.

BIOLOGICAL EXAMPLES

To describe in more detail and assist in understanding the present description, the following non-limiting biological examples are offered to more fully illustrate the scope of the description and are not to be construed as specifically limiting the scope thereof. Such variations of the present description that may be now known or later developed, which would be within the purview of one skilled in the art to ascertain, are considered to fall within the scope of the present description and as hereinafter claimed. These examples illustrate the testing of certain compounds described herein in vitro and/or in vivo and demonstrate the usefulness of the compounds for treating of SMA by enhancing the inclusion of exon 7 of SMN2 into mRNA transcribed from the SMN2 gene. Compounds of Formula (I) enhance inclusion of exon 7 of SMN2 into mRNA transcribed from the SMN2 gene and increase levels of Smn protein produced from the SMN2 gene, and thus can be used to treat SMA in a human subject in need thereof.

Example 1

SMN2 Minigene Construct

Preparation of the Minigene Constructs

DNA corresponding to a region of the SMN2 gene starting from the 5′ end of exon 6 (ATAATTCCCCC) (SEQ ID NO. 14) and ending at nucleic acid residue 23 of exon 8 (CAGCAC) (SEQ ID NO. 15) was amplified by PCR using the following primers: Forward primer: 5′-CGCGGATCCATAATTCCCCCACCACCTC-3′  (SEQ ID NO. 16) Reverse primer: 5′-CGCGGATCCGTGCTGCTCTATGCCAGCA-3′  (SEQ ID NO. 17)

The 5′ end of each primer was designed to add a BamHI restriction endonuclease recognition site at both the 5′ end of exon 6 (GGATCC) (SEQ ID NO. 18) and the 3′ end after the 23^(th) nucleotide of exon 8. Using the BamHI restriction endonuclease recognition sites, the PCR fragment was cloned into a derivative of the original pcDNA 3.1/Hygro vector which was modified as disclosed in United States Patent Publication US2005/0048549.

New UTRs were added to the modified vector using the HindIII site and the BamHI restriction sites comprising a 5′DEG UTR: 5′-TAGCTTCTTACCCGTACTCCACCGTTGGCAGCACGATCGCACGTCCCACGT GAACCATTGGTAAACCCTG-3′ (SEQ ID NO. 19) was cloned into the modified pcDNA3.1/Hygro vector together with a start codon upstream of the BamHI restriction site; and

a 3′DEG UTR: 5′-ATCGAAAGTACAGGACTAGCCTTCCTAGCAACCGCGGGCTGGGAGTCTGA GACATCACTCAAGATATATGCTCGGTAACGTATGCTCTAGCCATCTAACTATTCCCT ATGTCTTATAGGG-3′ (SEQ ID NO. 20) was cloned into the modified pcDNA3.1/Hygro vector using the NotI restriction endonuclease recognition site and the XhoI restriction endonuclease recognition site with a stop codon immediately downstream of the NotI restriction site. In addition, a firefly luciferase gene lacking its start codon was cloned into the vector using the BamHI and NotI restriction sites.

The resulting minigene comprises, in 5′ to 3′ order: the 5′-DEG UTR, the start codon, six additional nucleotides forming a BamHI restriction site, the nucleic acid residues of exon 6, the nucleic acid residues of intron 6 of SMN2, the nucleic acid residues of exon 7 of SMN2, the nucleic acid residues of intron 7 of SMN2, and the first 23 nucleic acid residues of exon 8 of SMN2, an additional six nucleotides forming a BamHI restriction site and the firefly luciferase gene lacking the start codon.

A single adenine residue was inserted after nucleotide 48 of exon 7 of SMN2 by site-directed mutagenesis. This minigene construct is referred to as SMN2-A.

SMN2 transcripts derived from minigenes containing exon 6 through 8 and the intervening introns recapitulate the splicing of their endogenous pre-mRNAs (Lorson et al, Proc. Natl. Acad. Sci. U.S.A., 1999, 96 (11), 6307). An SMN2-alternative splicing reporter construct which contains exons 6 through 8 and the intervening introns followed by a luciferase reporter gene was generated. Salient features of this construct are the lack of the start codon in the luciferase gene, inactivation of the termination codon (in the open reading frame that encodes the SMN protein) of exon 7 by insertion of a nucleotide after nucleic acid 48 of exon 7 and addition of a start codon (ATG) immediately upstream of exon 6. A single adenine (SMN2-A) was inserted after nucleic residue 48 of exon 7.

The SMN2 minigene was designed such that the luciferase reporter is in frame with the ATG start codon immediately upstream of exon 6 when exon 7 is present in the mRNA and the luciferase reporter is out of frame with the ATG start codon immediately upstream of exon 6 if exon 7 of SMN2 is removed during splicing of the pre-mRNA. In addition, in the absence of exon 7, the open reading frame that starts from the ATG start codon immediately upstream of exon 6 contains a stop codon in the fragment of exon 8 of SMN. Thus, in the presence of compounds that increase the inclusion of exon 7 of SMN2 into mRNA transcribed from the SMN2 gene, more transcripts containing exon 7 and more functional reporter are produced. A schematic illustration of this description can be found in FIG. 1.

The DNA sequence of the minigene from the SMN2-A construct SEQ ID NO. 21 is provided in FIG. 2a. A picture of the minigene SMN2-A subsequences is shown in FIG. 2b.

Example 2

SMN2 Minigene mRNA Splicing RT-qPCR Assay in Cultured Cells

The reverse transcription-quantitative PCR-based (RT-qPCR) assay is used to quantify the level of the full length SMN2 minigene mRNA containing SMN2 exon 7 in a HEK293H cell line stably transfected with said minigene and treated with a test compound.

Materials

Material Source HEK293H cells ATCC Catalog No. CRL-1573 Cells-To-Ct lysis buffer Life Technologies, Inc. (formerly Applied Biosystems) Catalog No.: 4399002 DMEM Life Technologies, Inc. (formerly Invitrogen) Catalog No.: 11960-044 96-well flat-bottom plates Becton Dickinson Catalog No.: 353072 RT-PCR Enzyme Mix Life Technologies, Inc. (formerly Applied Biosystems) part #4388520 (also included in AgPath-ID kit Catalog No.: 4387391) RT-PCR buffer Life Technologies, Inc. (formerly Applied Biosystems) part #4388519 (also included in AgPath-ID kit Catalog No.: 4387391) AgPath-ID One-Step Life Technologies, Inc. (formerly Applied RT-PCR kit Biosystems) Catalog No.: 4387391 Thermocycler Life Technologies, Inc. (formerly Applied Biosystems) 7900HT

Protocol. HEK293H cells stably transfected with the SMN2-A minigene construct described above (10,000 cells/well) are seeded in 200 μL of cell culture medium (DMEM plus 10% FBS, with 200 μg/mL hygromycin) in 96-well flat-bottom plates and the plate is immediately swirled to ensure proper dispersal of cells, forming an even monolayer of cells. Cells are allowed to attach for at least 4-6 hours. Test compounds are serially diluted 3.16-fold in 100% DMSO to generate a 7-point concentration curve. A solution of test compound (1 μL, 200× in DMSO) is added to each cell-containing well and the plate is incubated for 24 hours in a cell culture incubator (37° C., 5% CO₂, 100% relative humidity). 2 replicates are prepared for each test compound concentration. The cells are then lysed in Cells-To-Ct lysis buffer and the lysate is stored at −80° C.

Full length SMN2-A minigene and GAPDH mRNA are quantified using the following primers and probes provided in Table 3. Primer SMN Forward A (SEQ ID NO. 1) hybridizes to a nucleotide sequence in exon 7 (nucleotide 22 to nucleotide 40), primer SMN Reverse A (SEQ ID NO. 2) hybridizes to a nucleotide sequence in the coding sequence of Firefly luciferase, SMN Probe A (SEQ ID NO. 3) hybridizes to a nucleotide sequence in exon 7 (nucleotide 50 to nucleotide 54) and exon 8 (nucleotide 1 to nucleotide 21). The combination of these three oligonucleotides detects only SMN1 or SMN2 minigenes (RT-qPCR) and will not detect endogenous SMN1 or SMN2 genes.

TABLE 3 Primers/Probes Sequence Source SMN Forward SEQ ID NO. 1: PTC¹ Primer A GAAGGAAGGTGCTCACATT SMN Reverse SEQ ID NO. 2: PTC¹ Primer A TCTTTATGTTTTTGGCGTCTTC SP N Forward SEQ ID NO. 3: PTC¹ Probe A 6FAM- AAGGAGAAATGCTGGCAT AGAGCAGC-TAMRA hGAPDH Forward SEQ ID NO. 4: LTI² Probe VIC-CGCCTGGTCACCAGGGCT GCT-TAMRA hGAPDH Forward SEQ ID NO. 5: LTI² Primer CAACGGATTTGGTCGTATTGG hGAPDH Reverse SEQ ID NO. 6: LTI² Primer TGATGGCAACAATATCCACTTT ACC ¹Primers and probes designed by PTC Therapeutics, Inc.; ²Commercially available from Life Technologies, Inc. (formerly Invitrogen).

The SMN forward and reverse primers are used at final concentrations of 0.4 μM. The SMN probe is used at a final concentration of 0.15 μM. The GAPDH primers are used at final concentrations of 0.2 μM and the probe at 0.15 μM.

The SMN2-minigene GAPDH mix (15 μL total volume) is prepared by combining 7.5 μL of 2×RT-PCR buffer, 0.4 μL of 25×RT-PCR enzyme mix, 0.75 μL of 20×GAPDH primer-probe mix, 4.0075 μL of water, 2 μL of 10-fold diluted cell lysate, 0.06 μL of 100 μM SMN forward primer, 0.06 μL of 100 μM SMN reverse primer, and 0.225 μL of 100 μM SMN probe.

PCR is carried out at the following temperatures for the indicated time: Step 1: 48° C. (15 min); Step 2: 95° C. (10 min); Step 3: 95° C. (15 sec); Step 4: 60° C. (1 min); then repeat Steps 3 and 4 for a total of 40 cycles.

Each reaction mixture contains both SMN2-A minigene and GAPDH primers/probe sets (multiplex design), allowing simultaneous measurement of the levels of two transcripts.

Two SMN spliced products are generated from the SMN2 minigene. The first spliced product containing exon 7, corresponding to full length SMN2 mRNA, is called SMN2mini FL. The second one lacking exon 7 is called SMN2mini Δ7.

The increase of SMN2mini FL mRNA relative to that in cells treated with vehicle control is determined from real-time PCR data using a modified ΔΔCt method (as described in Livak and Schmittgen, Methods, 2001, 25:402-8). The amplification efficiency E is calculated from the slope of the amplification curve for SMN2mini FL and GAPDH individually. The abundances of SMN2mini FL and GAPDH are then calculated as (1+FE)^(−Ct), where Ct is the threshold value for each amplicon. The abundance of SMN2mini FL is normalized to GAPDH abundance. The normalized SMN2mini FL abundance from test compound-treated samples is then divided by normalized SMN2mini FL abundance from vehicle-treated cells to determine the level of SMN2 FL mRNA relative to vehicle control.

Results. As seen in FIG. 3, cells treated with Compound 35 (FIG. 3a) and Compound 626 (FIG. 3b) increased SMN2mini FL mRNA at low concentrations. The two test compounds fully restored exon 7 inclusion relative to untreated cells.

For compounds of Formula (I) or a form thereof disclosed herein, Table 4 provides the EC_(1.5x) for production of full length SMN2 mRNA that was obtained from the 7-point concentration data generated for each test compound according to the procedure of Biological Example 2. The term “EC_(1.5x) for production of full length SMN2 mRNA” is defined as that concentration of test compound that is effective in increasing the amount of full length SMN2 mRNA to a level 1.5-fold greater relative to that in vehicle-treated cells. An EC_(1.5x) for production of full length SMN2 mRNA between >3 μM and ≤30 μM is indicated by one star (*), an EC_(1.5x) between >1 μM and ≤3 μM is indicated by two stars (**), an EC_(1.5x) between >0.3 μM and ≤1 μM is indicated by three stars (***), an EC_(1.5x) between >0.1 μM and ≤0.3 μM is indicated by four stars (****) and an EC_(1.5x)≤0.1 μM is indicated by five stars (*****).

TABLE 4 Cpd EC_(1.5x) 1 *** 2 *** 3 ** 4 ** 5 *** 6 ** 7 * 8 ** 9 * 10 *** 11 * 12 * 13 ** 14 *** 15 * 16 *** 17 *** 18 *** 19 ** 20 * 21 * 22 * 23 ** 24 ** 25 *** 26 ** 27 ** 28 * 29 * 30 ** 31 * 32 * 33 * 34 *** 35 *** 36 ** 37 ** 38 ** 39 *** 40 ** 41 ** 42 ** 43 * 44 *** 45 * 46 *** 47 * 48 ** 49 * 50 ** 51 **** 52 *** 53 * 54 ** 55 ** 56 * 57 ** 58 ** 59 ** 60 ** 61 * 62 ** 63 ** 64 ** 65 *** 66 * 67 *** 68 ** 69 **** 70 *** 71 ** 72 *** 73 * 74 * 75 * 76 ** 77 * 78 *** 79 ** 80 * 81 *** 82 ** 83 *** 84 *** 85 * 86 * 87 *** 88 ***** 89 **** 90 *** 91 *** 92 ** 93 ** 94 * 95 ** 96 **** 97 ** 98 ** 99 * 100 *** 101 ** 102 ** 103 *** 104 * 105 ** 106 * 107 **** 108 ** 109 ** 110 * 111 * 112 * 113 * 114 ***** 115 *** 116 *** 117 **** 118 **** 119 *** 120 ***** 121 *** 122 ** 123 ** 124 *** 125 ** 126 * 127 ** 128 ** 129 *** 130 ** 131 *** 132 ** 133 **** 134 *** 135 *** 136 ** 137 ** 138 ** 139 ** 140 *** 141 ** 142 ** 143 ** 144 ** 145 **** 146 *** 147 ** 148 * 149 ** 150 *** 151 * 152 ***** 153 ** 154 * 155 * 156 ** 157 **** 158 ** 159 *** 160 *** 161 ** 162 **** 163 * 164 ** 165 * 166 ** 167 *** 168 ** 169 *** 170 *** 171 * 172 * 173 *** 174 ***** 175 * 176 ** 177 * 178 * 179 ** 180 ***** 181 ***** 182 ** 183 *** 184 *** 185 * 186 **** 187 *** 188 *** 189 ** 190 ** 191 *** 192 *** 193 **** 194 *** 195 ** 196 ** 197 *** 198 *** 199 ** 200 * 201 *** 202 *** 203 **** 204 **** 205 ***** 206 *** 207 ** 208 ** 209 *** 210 *** 211 *** 212 *** 213 **** 214 *** 215 ** 216 *** 217 *** 218 *** 219 * 220 **** 221 ** 222 ** 223 *** 224 *** 225 *** 226 * 227 **** 228 **** 229 **** 230 *** 231 *** 232 *** 233 **** 234 * 235 ** 236 ** 237 ** 238 ** 239 ** 240 ** 241 *** 242 *** 243 *** 244 *** 245 **** 246 **** 247 **** 248 **** 249 *** 250 **** 251 * 252 * 253 ** 254 *** 255 * 256 * 257 ** 258 *** 259 ** 260 *** 261 *** 262 *** 263 * 264 ** 265 ** 266 ** 267 ** 268 *** 269 ** 270 ** 271 ** 272 ** 273 ** 274 ** 275 *** 276 *** 277 *** 278 *** 279 ** 280 **** 281 *** 282 ** 283 *** 284 ** 285 ** 286 ** 287 *** 288 ** 289 *** 290 *** 291 *** 292 *** 293 *** 294 **** 295 ***** 296 **** 297 * 298 ** 299 ** 300 ** 301 ** 302 **** 303 *** 304 **** 305 *** 306 **** 307 *** 308 * 309 *** 310 *** 311 ***** 312 *** 313 *** 314 ** 315 *** 316 *** 317 * 318 ** 319 ** 320 ** 321 ** 322 *** 323 *** 324 *** 325 *** 326 **** 327 *** 328 *** 329 *** 330 *** 331 *** 332 *** 333 *** 334 **** 335 **** 336 *** 337 ** 338 **** 339 **** 340 *** 341 *** 342 **** 343 **** 344 *** 345 ** 346 * 347 * 348 ** 349 ** 350 ** 351 *** 352 **** 353 ***** 354 ***** 355 ***** 356 ***** 357 **** 358 ** 359 * 360 ** 361 ** 362 *** 363 ** 364 ** 365 ** 366 *** 367 **** 368 *** 369 **** 370 *** 371 *** 372 **** 373 ***** 374 ** 375 *** 376 ** 377 *** 378 **** 379 *** 380 *** 381 ** 382 ** 383 **** 384 * 385 ** 386 * 387 * 388 *** 389 *** 390 **** 391 ** 392 *** 393 *** 394 * 395 *** 396 ** 397 * 398 ** 399 * 400 * 401 ** 402 * 403 * 404 *** 405 * 406 * 407 *** 408 *** 409 ** 410 ***** 411 * 412 * 413 ** 414 * 415 * 416 ** 417 **** 418 ** 419 *** 420 ***** 421 ***** 422 *** 423 ** 424 **** 425 **** 426 **** 427 *** 428 ** 429 *** 430 ** 431 ** 432 ** 433 * 434 ** 435 ** 436 * 437 ** 438 **** 439 * 440 ** 441 ***** 442 * 443 ***** 444 * 445 * 446 * 447 ** 448 ** 449 ** 450 ** 451 ** 452 * 453 * 454 ***** 455 ***** 456 ***** 457 **** 458 *** 459 ***** 460 **** 461 * 462 ***** 463 **** 464 **** 465 * 466 * 467 * 468 *** 469 **** 470 ** 471 **** 472 ** 473 **** 474 ** 475 * 476 ***** 477 ***** 478 *** 479 *** 480 * 481 ** 482 ***** 483 **** 484 *** 485 ** 486 * 487 * 488 * 489 * 490 ** 491 ** 492 ** 493 ***** 494 **** 495 ** 496 *** 497 *** 498 *** 499 *** 500 *** 501 **** 502 ** 503 *** 504 ** 505 * 506 **** 507 **** 508 *** 509 ** 510 * 511 ** 512 ** 513 ** 514 * 515 ***** 516 ***** 517 ***** 518 ***** 519 ***** 520 *** 521 *** 522 *** 523 *** 524 *** 525 **** 526 **** 527 **** 528 ** 529 ** 530 *** 531 *** 532 *** 533 ***** 534 ** 535 ** 536 ***** 537 ***** 538 * 539 * 540 * 541 ** 542 ** 543 ** 544 **** 545 **** 546 * 547 * 548 * 549 ** 550 ***** 551 *** 552 ***** 553 *** 554 ***** 555 **** 556 **** 557 *** 558 ***** 559 *** 560 **** 561 *** 562 ***** 563 ***** 564 ***** 565 ** 566 ***** 567 ***** 568 ***** 569 ***** 570 ***** 571 *** 572 **** 573 *** 574 ** 575 *** 576 ** 577 ** 578 ** 579 *** 580 ** 581 *** 582 *** 583 *** 584 ***** 585 *** 586 ***** 587 ***** 588 ***** 589 ***** 590 ***** 591 ***** 592 ***** 593 ***** 594 ***** 595 *** 596 *** 597 ***** 598 **** 599 **** 600 ***** 601 ***** 602 *** 603 *** 604 *** 605 ***** 606 ***** 607 ***** 608 ***** 609 ***** 610 *** 611 *** 612 *** 613 *** 614 ***** 615 ***** 616 **** 617 ***** 618 ***** 619 ***** 620 ***** 621 ***** 622 ***** 623 ***** 624 ***** 625 ***** 626 ***** 627 ***** 628 ***** 629 *** 630 *** 631 *** 632 ***** 633 ***** 634 ***** 635 ***** 636 ***** 637 ***** 638 ***** 639 ***** 640 ***** 641 *** 642 ***** 643 ***** 644 ***** 645 ***** 646 ***** 647 ***** 648 ***** 649 **** 650 ***** 651 ***** 652 ***** 653 **** 654 ***** 655 ***** 656 ***** 657 ***** 658 ***** 659 ***** 660 ***** 661 ***** 662 ***** 663 ***** 664 ***** 665 ***** 666 ***** 667 ***** 668 ***** 669 ***** 670 ***** 671 ***** 672 ***** 673 ***** 674 ***** 675 ***** 676 ***** 677 ***** 678 ***** 679 ***** 680 ***** 681 ***** 682 ***** 683 ***** 684 ***** 685 ***** 686 ***** 687 ***** 688 ***** 689 *** 690 **** 691 ***** 692 ***** 693 ***** 694 ***** 695 ***** 696 ***** 697 ***** 698 ** 699 **** 700 **** 701 ** 702 ** 703 ** 704 ***** 705 **** 706 ***** 707 ***** 708 ***** 709 ***** 710 ***** 711 ***** 712 ***** 713 ***** 714 **** 715 ***** 716 ***** 717 *** 718 ***** 719 ***** 720 *** 721 ** 722 ** 723 ***** 724 ** 725 ***** 726 ***** 727 **** 728 *** 729 ***** 730 ***** 731 ***** 732 ***** 733 ***** 734 ***** 735 ***** 736 ***** 737 ***** 738 ***** 739 ***** 740 ***** 741 ***** 742 ***** 743 ***** 744 ***** 745 ***** 746 ***** 747 ***** 748 ***** 749 ***** 750 ***** 751 ***** 752 ***** 753 ***** 754 ***** 755 ***** 756 ***** 757 *** 758 *** 759 ***** 760 **** 761 ***** 762 ***** 763 ***** 764 ***** 765 *** 766 ***** 767 ***** 768 ***** 769 *** 770 ***** 771 ** 772 ***** 773 ***** 774 ***** 775 ***** 776 ** 777 * 778 ***** 779 ***** 780 ***** 781 ***** 782 ***** 783 ***** 784 ** 785 ***** 786 ***** 787 ***** 788 ***** 789 ***** 790 *** 791 ***** 792 ***** 793 ***** 794 ***** 795 ***** 796 ***** 797 ***** 798 **** 799 ***** 800 ***** 801 ***** 802 ***** 803 ***** 804 ***** 805 ***** 806 ***** 807 ***** 808 ***** 809 *** 810 *** 811 *** 812 ***** 813 ***** 814 ***** 815 ***** 816 ***** 817 ***** 818 ** 819 ***** 820 *** 821 ***** 822 ***** 823 *** 824 ***** 825 ***** 826 ***** 827 ***** 828 **** 829 ***** 830 ***** 831 ** 832 ** 833 ***** 834 ***** 835 *** 836 *** 837 ***** 838 ***** 839 **** 840 *** 841 ***** 842 ***** 843 ***** 844 ***** 845 ** 846 **** 847 ** 848 ***** 849 **** 850 *** 851 ** 852 ***** 853 ** 854 ***** 855 ***** 856 ***** 857 ***** 858 ***** 859 **** 860 *** 861 ***** 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Example 3

Endogenous SMN2 mRNA RT-qPCR Splicing Assay in Cultured Cells

The reverse transcription-quantitative PCR-based (RT-qPCR) assay is used to quantify the levels of the full length and Δ7 SMN2 mRNAs in primary cells and cell lines containing the SMN2 gene treated with a test compound.

Materials

Material Source SMA Type 1 human cells GM03813 (Coriell Institute) Cells-To-Ct lysis buffer Life Technologies, Inc. (formerly Applied Biosystems) Catalog No.: 4399002 DMEM Life Technologies, Inc. (formerly Invitrogen) Catalog No.: 11960-044 96-well flat-bottom Becton Dickinson Catalog #353072 plates RT-PCR Enzyme Mix Life Technologies, Inc. (formerly Applied Biosystems) part #4388520 (also included in AgPath-ID kit Catalog No.: 4387391) RT-PCR buffer Life Technologies, Inc. (formerly Applied Biosystems) part #4388519 (also included in AgPath-ID kit Catalog No.: 4387391) AgPath-ID One-Step RT- Life Technologies, Inc. (formerly Applied PCR kit Biosystems) Catalog No.: 4387391 Thermocycler Life Technologies, Inc. (formerly Applied Biosystems) 7900HT

Protocol. GM03813 SMA patient cells (5,000 cells/well) are seeded in 200 μL, of cell culture medium (DMEM plus 10% FBS) in 96-well flat-bottom plates and the plate is immediately swirled to ensure proper dispersal of cells, forming an even monolayer of cells. Cells are allowed to attach for at least 4-6 hrs. Test compounds are serially diluted 3.16-fold in 100% DMSO to generate a 7-point concentration curve. A solution of test compound (1 μL, 200× in DMSO) is added to each test well and 1 μL, DMSO is added to each control well. The plate is incubated for 24 hrs in a cell culture incubator (37° C., 5% CO₂, 100% relative humidity). The cells are then lysed in Cells-To-Ct lysis buffer and the lysate is stored at −80° C.

SMN2-specific spliced products and GAPDH mRNA are identified using the following primers and probes in Table 5. Primer SMN FL Forward B (SEQ ID NO. 7) hybridizes to a nucleotide sequence in exon 7 (nucleotide 32 to nucleotide 54) and exon 8 (nucleotide 1 to nucleotide 4), primer SMN Δ7 Forward B (SEQ ID NO. 8) hybridizes to a nucleotide sequence in exon 6 (nucleotide 87 to nucleotide 111) and exon 8 (nucleotide 1 to nucleotide 3), primer SMN Reverse B (SEQ ID NO. 9) hybridizes to a nucleotide sequence in exon 8 (nucleotide 39 to nucleotide 62), probe SMN Probe B (SEQ ID NO. 10) hybridizes to a nucleotide sequence in exon 8 (nucleotide 7 to nucleotide 36). These primers and probe hybridize to nucleotide sequences common to human SMN1 and SMN2 mRNAs. Since the SMA patient cells used in Example 3 contain only the SMN2 gene, RT-qPCR can quantify only SMN2 full-length and Δ7 mRNA.

TABLE 5 Primer/Probe Sequence Source SMN FL Forward SEQ ID NO. 7: PTC¹ Primer B GCTCACATTCCTTAAATTAAGG AGAAA SMN Δ7 Forward SEQ ID NO. 8: PTC¹ Primer B TGGCTATCATACTGGCTATTAT ATGGAA SMN Reverse SEQ ID NO. 9: PTC¹ Primer B TCCAGATCTGTCTGATCGTTTC TT SMN Forward SEQ ID NO. 10: PTC¹ Probe B 6FAM- CTGGCATAGAGCAGCACT AAATGACACCAC-TAMRA hGAPDH Forward SEQ ID NO. 4: LTI² Probe VIC-CGCCTGGTCACCAGGGCT GCT-TAMRA hGAPDH Forward SEQ ID NO. 5: LTI² Primer CAACGGATTTGGTCGTATTGG hGAPDH Reverse SEQ ID NO. 6: LTI² Primer TGATGGCAACAATATCCACTTT ACC ¹Primers and probes designed by PTC Therapeutics, Inc.; ²Commercially available from Life Technologies, Inc. (formerly Invitrogen).

The SMN forward and reverse primers are used at final concentrations of 0.4 μM. The SMN probe is used at a final concentration of 0.15 μM. GAPDH primers are used at final concentrations of 0.1 μM and the probe at 0.075 μM. TaqMan gene expression assays were conducted at 20× concentrations with the GAPDH primers and Vic labeled probe provided as a 20× mixture. The One-Step RT-PCR kit was used as the Real-Time PCR Mix.

The SMN-GAPDH mix (10 μL total volume) is prepared by combining 5 μL of 2×RT-PCR buffer, 0.4 μL of 25×RT-PCR enzyme mix, 0.25 μL of 20×GAPDH primer-probe mix, 1.755 μL water, 2.5 μL of cell lysate, 0.04 μL of 100 μM SMN FL or SMN Δ7 forward primer, 0.04 μL of 100 μM SMN reverse primer, and 0.015 μL of 100 μM probe.

PCR is carried out at the following temperatures for indicated time: Step 1: 48° C. (15 min); Step 2: 95° C. (10 min); Step 3: 95° C. (15 sec); Step 4: 60° C. (1 min); then, repeat Steps 3 and 4 for a total of 40 cycles.

Each reaction mixture contains either SMN2 FL and GAPDH or SMN2 Δ7 and GAPDH primers/probe sets (multiplex design), allowing simultaneous measurement of the levels of two transcripts.

The endogenous SMN2 gene gives rise to two alternatively spliced mRNAs. The full length SMN2 mRNA contains exon 7 and termed SMN2 FL. The truncated mRNA lacks exon 7 and termed SMN2 Δ7.

The increase of SMN2 FL and decrease in SMN2 Δ7 mRNAs relative to those in cells treated with vehicle control are determined from real-time PCR data using a modified ΔΔCt method (as described in Livak and Schmittgen, Methods, 2001, 25:402-8). The amplification efficiency E is calculated from the slope of the amplification curve for SMN2 FL, SMN2 Δ7, and GAPDH individually. The abundances of SMN2 FL, SMN2 Δ7, and GAPDH are then calculated as (1+E)^(−Ct), where Ct is the threshold value for each amplicon. The abundances of SMN2 FL and SMN2 Δ7 are normalized to GAPDH abundance. The normalized SMN2 FL and SMN2 Δ7 abundances from test compound-treated samples are then divided by normalized SMN2 FL and SMN2 Δ7 abundances, respectively, from vehicle-treated cells to determine the levels of SMN2 FL and SMN2 Δ7 mRNAs relative to vehicle control.

Results. As seen in FIG. 4, cells treated with increasing concentrations of Compound 35 (FIG. 4a) and Compound 626 (FIG. 4b) contain progressively more SMN2 FL mRNA and less SMN2 Δ7 mRNA than those treated with vehicle indicating a correction of SMN2 alternative splicing.

Example 4

Endogenous SMN2 mRNA End-Point Semi-Quantitative RT-PCR Splicing Assay in Cultured Cells

The endpoint reverse transcription-PCR splicing assay is used to visualize and quantify the levels of the full length and Δ7 SMN2 mRNAs in primary cells and cell lines containing the SMN2 gene treated with a test compound.

Materials

Material Source SMA Type 1 human cells GM03813 (Coriell Institute) Cells-To-Ct lysis buffer Life Technologies, Inc. (formerly Applied Biosystems) Catalog No.: 4399002 DMEM Life Technologies, Inc. (formerly Invitrogen) Catalog No.: 11960-044 96-well flat-bottom plates Becton Dickinson Catalog No.: 353072 Platinum Tag HiFi DNA Life Technologies, Inc. (formerly Invitrogen) Polymerase Super Mix Catalog No.: 11304-016 iScript RT enzyme kit BioRad Catalog No.: 170-8890 Ethidium bromide 2% Life Technologies, Inc. (formerly Invitrogen) agarose E gels 48-Well Catalog No.: G8008-02 Double Comb Gel Documentation System UVP Gel Doc It 310 Imaging system

Protocol. GM03813 SMA patient cells (5,000 cells/well) are seeded in 200 μL of cell culture medium (DMEM plus 10% FBS) in 96-well flat-bottom plates and the plate is immediately swirled to ensure proper dispersal of cells, forming an even monolayer of cells. Cells are allowed to attach for at least 4-6 hrs. Test compounds are serially diluted 3.16-fold in 100% DMSO to generate a 7-point concentration curve. A solution of test compound (1 μL, 200× in DMSO) is added to each test well and 1 μL DMSO is added to each control well. The plate is incubated for 24 hrs in a cell culture incubator (37° C., 5% CO₂, 100% relative humidity). The cells are then lysed in Cells-To-Ct lysis buffer and the lysate is stored at −80° C.

SMN FL and Δ7 mRNAs are identified using the following primers in Table 6. These primers hybridize to a nucleotide sequence in exon 6 (SMN Forward C, SEQ ID NO. 11) (nucleotide 43 to nucleotide 63) and exon 8 (SMN Reverse C, SEQ ID NO. 12) (nucleotide 51 to nucleotide 73) common to human SMN1 and SMN2 mRNAs. Since the SMA patient cells used in Example 4 contain only the SMN2 gene, RT-PCR can visualize and quantify only SMN2 full-length and SMN2 Δ7 mRNAs.

TABLE 6 Primer Sequence Source SMN Forward C SEQ ID NO. 11: PTC¹ GATGCTGATGCTTTGGGAAGT SMN Reverse C SEQ ID NO. 12: PTC¹ CGCTTCACATTCCAGATCTGTC ¹Primers designed by PTC Therapeutics, Inc.

To synthesize cDNA, 5 μL of lysate, 4 μL of 5× iScript reaction mix, 1 μL of reverse transcriptase, and 10 μL of water are combined and incubated 5 min at 25° C. followed by 30 min at 42° C., followed by 5 min at 85° C. cDNA solution is stored at −20° C.

To perform endpoint PCR, 5 μL of cDNA, 0.2 μL of 100 μM forward primer, 0.2 μL of 100 μM reverse primer, and 22.5 μL of polymerase super mix are combined in a 96 well semiskirted PCR plate. PCR is carried out at the following temperatures for indicated time: Step 1: 94° C. (2 min), Step 2: 94° C. (30 sec), Step 3: 55° C. (30 sec), Step 4: 68° C. (1 min), then repeat Steps 2 to 4 for a total of 33 cycles, then hold at 4° C.

10 μL of each PCR sample is electrophoretically separated on a 2% agarose E-gel for 14 minutes stained with ds DNA staining reagents (e.g., ethidium bromide) and visualized using a gel imager.

Results. As seen in FIG. 5, cells treated with increasing concentrations of Compound 35 (FIG. 5a) and Compound 626 (FIG. 5b) contain progressively more SMN2 FL mRNA and less SMN2 Δ7 mRNA indicating a correction of SMN2 alternative splicing.

Example 5

SMN2 mRNA RT-qPCR Splicing Assay in Animal Tissues

The reverse transcription-quantitative PCR-based (RT-qPCR) assay is used to quantify the levels of the full length and Δ7 SMN2 mRNAs in tissues from mice treated with test compound.

Materials

Material Source Tissues from C/C-allele The Jackson Laboratory, strain #008714 SMA mice (B6.129-Smn1^(tm5(Smn1/SMN2)Mrph)/J) Tissues from Δ7 SMA mice The Jackson Laboratory, strain #005025 (FVB.Cg-Tg(SMN2*delta7)4299Ahmb Tg(SMN2)89Ahmb Smn1^(tm1Msd)/J) RT-PCR Enzyme Mix Life Technologies, Inc. (formerly Applied Biosystems) part #4388520 (also included in AgPath-ID kit Catalog No.: 4387391) RT-PCR buffer Life Technologies, Inc. (formerly Applied Biosystems) part #4388519 (also included in AgPath-ID kit Catalog No.: 4387391) AgPath-ID One-Step RT- Life Technologies, Inc. (formerly Applied PCR kit Biosystems) Catalog No.: 4387391 Mouse GAPDH primers Life Tecimologies, Inc. (formerly Applied and probes Biosystems) Catalog No.: 4352339E QIAzol Lysis Reagent Qiagen Catalog No.: 79306 RNeasy Lipid Tissue Mini Kit Qiagen Catalog No.: 74804 5 mm Stainless Steel Bead Qiagen Catalog No.: 69989 TissueLyzer II Qiagen Catalog No.: 85300 Thermocycler Life Tecimologies, Inc. (formerly Applied Biosystems) 7900HT

Protocol. C/C-allele SMA mice are treated by oral gavage two times per day for 10 days with test compounds resuspended in 0.5% HPMC and 0.1% Tween-80. Tissue samples were collected and snap frozen for RNA purification.

Tissue samples (20-40 mg) are homogenized in QIAzol Lysis Reagent for 2 minutes at 20 Hz in the TissueLyser II using one stainless steel bead. After addition of chloroform, the homogenate is separated into aqueous and organic phases by centrifugation. RNA partitioned to the upper, aqueous phase is extracted and ethanol is added to provide appropriate binding conditions. The sample is then applied to the RNeasy spin column from the RNeasy Mini Kit, where total RNA binds to the membrane. The RNA is eluted in RNase-free water then stored at −20° C. and subsequently analyzed using the TaqMan RT-qPCR on the 7900HT Thermocycler. Total RNA is diluted ten fold and 2.5 μL of the diluted sample is added to the TaqMan RT-qPCR mixture.

SMN2 spliced products are identified using the following primers and probes in Table 7. Primer SMN FL Forward B (SEQ ID NO. 7) hybridizes to a nucleotide sequence in exons 7 and 8, primer SMN Δ7 Forward B (SEQ ID NO. 8) hybridizes to a nucleotide sequence in exons 6 and 8, primer SMN Reverse B (SEQ ID NO. 9) hybridizes to a nucleotide sequence in exon 8, probe SMN Probe B (SEQ ID NO. 10) hybridizes to a nucleotide sequence in exon 8. These primers and probe hybridize to nucleotide sequences common to human SMN1 and SMN2 mRNAs. Since the SMA patient cells used in Example 5 contain only the SMN2 gene, RT-qPCR can quantify only SMN2 full-length and Δ7 mRNAs.

TABLE 7 Primer/Probe Sequence Source SMN FL Forward SEQ ID NO. 7: PTC¹ Primer B GCTCACATTCCTTAAATTAAGG AGAAA SMN Δ7 Forward SEQ ID NO. 8: PTC¹ Primer B TGGCTATCATACTGGCTATTAT ATGGAA SMN Reverse SEQ ID NO. 9: PTC¹ Primer B TCCAGATCTGTCTGATCGTTTC TT SMN Forward SEQ ID NO. 10: PTC¹ Probe B 6FAM-CTGGCATAGAGCAGCAC TAAATGACACCAC-TAMRA ¹Primers and probes designed by PTC Therapeutics, Inc.

The SMN forward and reverse primers are used at final concentrations of 0.4 μM. The SMN probe is used at a final concentration of 0.15 μM. The SMN-GAPDH Mix (10 μL total volume) is prepared by combining 5 μL of 2×RT-PCR buffer, 0.4 μL of 25×RT-PCR enzyme mix, 0.5 μL of 20×GAPDH primer-probe mix, 1.505 μL of water, 2.5 μL of RNA solution, 0.04 μL of 100 μM forward primer, 0.04 μL of 100 μM reverse primer, and 0.015 μL of 100 μM SMN probe.

Each PCR cycle was carried out at the following temperatures for indicated time: Step 1: 48° C. (15 min); Step 2: 95° C. (10 min); Step 3: 95° C. (15 sec); Step 4: 60° C. (1 min); then, repeat Steps 3 and 4 for a total of 40 cycles.

Each reaction mixture contains either SMN2 FL and mGAPDH or SMN2 Δ7 and mGAPDH primers/probe sets (multiplex design), allowing simultaneous measurement of the levels of two transcripts.

The increase of SMN2 FL and decrease in SMN2 Δ7 mRNAs relative to those in tissues from animals treated with vehicle control are determined from real-time PCR data using a modified ΔΔCt method (as described in Livak and Schmittgen, Methods, 2001, 25:402-8). The amplification efficiency E is calculated from the slope of the amplification curve for SMN2 FL, SMN2 Δ7, and GAPDH individually. The abundances of SMN2 FL, SMN2 Δ7, and GAPDH are then calculated as (1+E)^(−Ct), where Ct is the threshold value for each amplicon. The abundances of SMN2 FL and SMN2 Δ7 are normalized to GAPDH abundance. The normalized SMN2 FL and SMN2 Δ7 abundances from test compound-treated samples are then divided by normalized SMN2 FL and SMN2 Δ7 abundances, respectively, from vehicle-treated cells to determine the levels of SMN2 FL and SMN2 Δ7 mRNAs relative to vehicle control.

Results. As seen in FIG. 6, tissues of animals treated with Compound 35 (FIG. 6a) and Compound 626 (FIG. 6b) contain substantially more SMN2 FL mRNA and less SMN2 Δ7 mRNA than those treated with vehicle indicating a correction of SMN2 alternative splicing.

Example 6

Endogenous SMN2 mRNA End-Point Semi-Quantitative RT-PCR Splicing Assay in Animal Tissues

The endpoint reverse transcription-PCR (RT-PCR) splicing assay is used to quantify the levels of the full length and Δ7 SMN2 mRNAs in tissues from mice treated with test compound.

Materials

Material Source Tissues from C/C-allele The Jackson Laboratory, strain #008714 SMA mice (B6.129-Smn1^(tm5(Smn1/SMN2)Mrph)/J) Tissues from ΔExon7 The Jackson Laboratory, strain #005025 SMA mice (FVB.Cg-Tg(SMN2*delta7)4299 Ahmb Tg(SMN2)89Ahmb Smn1^(tm1Msd)/J) Qiagen RNeasy lipid kit Qiagen Catalog No.: 74804 Platinum Tag HiFi DNA Life Technologies, Inc. (formerly Invitrogen) Polymerase Super Mix Catalog No.: 11304-016 iScript RT enzyme kit BioRad Catalog No.: 170-8890 Twin.tec 96-Well Semi- Eppendorf Catalog No.: 951020389 skirted PCR Plate Ethidium bromide 2% Life Technologies, Inc. (formerly Invitrogen) agarose E gels 48-Well Catalog No.: G8008-02 Double Comb Gel Documentation UVP Gel Doc It 310 Imaging system System

Protocol. C/C-allele SMA mice are treated by oral gavage two times per day for 10 days with test compounds in 0.5% HPMC and 0.1% Tween-80. Tissue samples are collected and snap frozen for RNA purification.

Tissue samples (20-40 mg) are homogenized in QIAzol Lysis Reagent for 2 minutes at 20 Hz in the TissueLyser II using one stainless steel bead. After addition of chloroform, the homogenate is separated into aqueous and organic phases by centrifugation. RNA partitioned to the upper, aqueous phase is extracted and ethanol is added to provide appropriate binding conditions. The sample is then applied to the RNeasy spin column from the RNeasy Mini Kit, where total RNA binds to the membrane. The RNA is eluted in RNase-free water then stored at −20° C.

SMN2 spliced products are identified using the following amplification primers in Table 8. These primers hybridize to a nucleotide sequence in exon 6 (SMN Forward D, SEQ ID NO. 13) (nucleotide 22 to nucleotide 46) and exon 8 (SMN Reverse C, SEQ ID NO. 12) common to human SMN1 and SMN2 mRNAs.

TABLE 8 Primer Sequence Source SMN Forward D SEQ ID NO. 13: PTC¹ ATATGTCCAGATTCTCTTGATG ATG SMN Reverse C SEQ ID NO. 12: PTC¹ CGCTTCACATTCCAGATCTGTC ¹Primers designed by PTC Therapeutics, Inc.

To synthesize cDNA, combine 1 μL of RNA solution (25-50 ng), 4 μL of 5× iScript reaction mix, 1 μL of reverse transcriptase, and 10 μL of water are combined and incubates 25° C. for 5 min followed by 42° C. for 30 min followed by 85° C. for 5 min. cDNA solution is stored at −20° C.

To perform endpoint PCR, 5 μL of cDNA, 0.2 μL of 100 μM forward primer, 0.2 μL of 100 μM reverse primer, and 22.5 μL of polymerase super mix are combined in a 96 well semiskirted PCR plate. PCR is carried out at the following temperatures for indicated time: Step 1: 94° C. (2 min), Step 2: 94° C. (30 sec), Step 3: 55° C. (30 sec), Step 4: 68° C. (1 min), then repeat Steps 2 to 4 for a total of 33 cycles, then hold at 4° C.

10 μL of each PCR sample is electrophoretically separated on a 2% agarose E-gel for 14 minutes, stained with ds DNA staining reagents (e.g., ethidium bromide) and visualized using a gel imager.

Results. As seen in FIG. 7, tissues from mice treated with increasing concentrations of Compound 35 (FIGS. 7a) and Compound 626 (FIG. 7b) contain progressively more SMN2 FL mRNA and less SMN2 Δ7 mRNA indicating a correction of SMN2 alternative splicing.

Example 7

Smn Protein Assay in Cultured Cells

The SMN HTRF (homogeneous time resolved fluorescence) assay is used to quantify the level of Smn protein in SMA patient fibroblast cells treated with test compounds. The results of the assay are shown in Table 9.

Materials

Material Source SMA Type 1 human cells GM03813 (Coriell Institute) Protease inhibitor cocktail Roche Applied Science Catalog No.: 11836145001 Anti-SMN d2 Blue cap Cisbio Catalog No.: 63IDC002- SMN Anti-SMN kryptate Red cap Cisbio Catalog No.: 63IDC002- SMN SMN reconstitution buffer Cisbio Catalog No.: 63IDC002-SMN-Buffer DMEM Life Technologies, Inc. (formerly Invitrogen) Catalog No.: 11960-044 RIPA Lysis Buffer 20 mM Tris-HCl pH 7.5, 150 mM NaCl, 1 mM EDTA, 1% NP-40, 1% Sodium deoxycholate Diluent Buffer 20 mM Tris-HCl pH 7.5, 150 mM NaCl Envision Plate Reader Perkin Elmer Model No.: 2103

Protocol. Cells are thawed and cultured in DMEM-10% FBS for 72 hours. Cells are trypsinized, counted and resuspended to a concentration of 25,000 cells/mL in DMEM-10% FBS. The cell suspensions are plated at 5,000 cells per well in a 96 well microtiter plate and incubated for 3 to 5 hours. To provide a control signal, three (3) wells in the 96 well plate do not receive cells and, thus, serve as Blank control wells. Test compounds are serially diluted 3.16-fold in 100% DMSO to generate a 7-point concentration curve. 1 μL of test compound solution is transferred to cell-containing wells and cells are incubated for 48 hours in a cell culture incubator (37° C., 5% CO₂, 100% relative humidity). Triplicate samples are set up for each test compound concentration. After 48 hours, the supernatant is removed from the wells and 25 μL of the RIPA lysis buffer, containing protease inhibitors, is added to the wells and incubated with shaking at room temperature for 1 hour. 25 μL of the diluent is added and then 35 μL of the resulting lysate is transferred to a 384-well plate, where each well contains 5 μL of the antibody solution (1:100 dilution of anti-SMN d2 and anti-SMN kryptate in SMN reconstitution buffer). The plate is centrifuged for 1 minute to bring the solution to the bottom of the wells, then incubated overnight at room temperature. Fluorescence for each well of the plate at 665 nm and 620 nm is measured on an EnVision multilabel plate reader (Perkin-Elmer).

The normalized fluorescence signal is calculated for each sample, Blank and vehicle control well by dividing the signal at 665 nm by the signal at 620 nm. Normalizing the signal accounts for possible fluorescence quenching due to the matrix effect of the lysate. The ΔF value (a measurement of Smn protein abundance) for each sample well is calculated by subtracting the normalized average fluorescence for the Blank control wells from the normalized fluorescence for each sample well and then dividing this difference by the normalized average fluorescence for the Blank control wells. The resulting ΔF value for each sample well represents the Smn protein abundance from test compound-treated samples. The ΔF value for each sample well is divided by the ΔF value for the vehicle control wells to calculate the fold increase in Smn protein abundance relative to the vehicle control.

Results. As seen in FIG. 8, SMA Type 1 patient fibroblast cells treated with Compound 35 (FIG. 8a) and Compound 626 (FIG. 8b) show a dose dependent increase in Smn protein expression as measured by the SMN HTRF assay.

For compounds of Formula (I) or a form thereof disclosed herein, Table 9 provides the EC_(1.5x) for Smn protein expression that was obtained from the 7-point concentration data generated for each test compound according to the procedure of Biological Example 7. The term “EC_(1.5x) for Smn protein expression” is defined as that concentration of test compound that is effective in producing 1.5 times the amount of Smn protein in a SMA patient fibroblast cell compared to the amount produced from the DMSO vehicle control. An EC_(1.5x) for Smn protein expression between >3 μM and ≤10 μM is indicated by one star (*), an EC_(1.5x) between >1 and ≤3 μM is indicated by two stars (**), an EC_(1.5x) between >0.3 μM and ≤1 μM is indicated by three stars (***) and an EC_(1.5x)≤0.3 μM is indicated by four stars (****).

TABLE 9 Cpd EC_(1.5x) 39 * 51 **** 58 *** 72 *** 81 * 83 ** 84 ** 87 ** 88 ** 89 *** 95 **** 96 * 97 * 98 ** 105 *** 107 *** 108 *** 109 * 117 *** 118 **** 120 **** 123 *** 128 * 133 * 134 ** 142 *** 148 ** 150 * 152 ** 161 * 162 *** 169 ** 186 ** 188 * 193 * 198 * 203 *** 212 *** 227 * 231 * 243 * 246 ** 248 ** 250 ** 271 * 294 ** 295 *** 302 *** 303 * 304 ** 307 * 311 ** 335 ** 338 * 345 * 353 ** 354 ** 355 *** 373 *** 383 ** 404 ** 417 **** 418 *** 420 **** 421 **** 424 **** 425 ** 438 ** 443 *** 450 ** 454 * 455 *** 456 ** 459 * 460 * 462 ** 471 *** 476 **** 477 **** 482 **** 483 ** 493 **** 507 **** 515 **** 516 **** 517 **** 518 **** 519 **** 527 **** 530 **** 533 **** 536 **** 537 **** 550 **** 551 **** 552 **** 554 **** 555 **** 556 *** 558 *** 560 **** 561 **** 562 **** 563 **** 564 **** 566 **** 567 **** 568 **** 569 **** 570 **** 572 *** 573 **** 584 **** 586 **** 587 **** 588 **** 589 **** 590 **** 591 **** 592 **** 593 **** 594 **** 597 **** 600 **** 601 **** 605 **** 606 **** 607 *** 608 **** 609 **** 611 ** 614 **** 615 **** 618 **** 619 **** 620 **** 621 **** 622 **** 623 *** 625 *** 626 **** 627 **** 628 **** 632 **** 634 **** 635 **** 638 **** 640 **** 643 **** 644 **** 645 **** 646 **** 647 **** 648 **** 649 *** 650 *** 651 **** 652 **** 654 **** 655 **** 656 **** 657 **** 658 **** 659 **** 660 *** 661 **** 662 ** 664 **** 665 **** 666 **** 667 **** 668 **** 669 **** 670 **** 671 **** 672 **** 673 **** 674 **** 675 ** 676 **** 677 **** 678 **** 679 **** 680 **** 681 **** 682 ** 683 **** 684 **** 685 **** 686 **** 687 ** 688 **** 690 *** 691 **** 692 **** 693 *** 694 **** 696 **** 697 *** 699 *** 700 **** 704 **** 706 *** 707 *** 709 *** 711 ** 713 **** 716 ** 718 **** 723 **** 725 *** 726 *** 727 ** 729 ** 732 **** 734 **** 735 *** 736 **** 737 **** 738 **** 739 **** 740 **** 741 **** 742 **** 743 **** 745 **** 746 **** 747 **** 748 **** 749 **** 750 **** 752 *** 753 ** 757 ** 761 **** 762 *** 763 **** 767 **** 768 **** 770 **** 772 **** 773 **** 774 **** 775 **** 778 **** 779 **** 780 **** 782 **** 785 ** 786 **** 787 *** 788 **** 791 ** 792 **** 793 **** 794 **** 795 **** 796 *** 797 **** 798 *** 799 **** 800 **** 801 **** 802 **** 804 **** 805 **** 806 **** 807 **** 808 **** 809 ** 810 ** 811 *** 813 **** 814 **** 815 **** 816 *** 821 **** 822 **** 823 ** 824 **** 825 **** 826 **** 827 **** 828 *** 829 **** 830 **** 833 **** 834 **** 835 *** 836 *** 837 **** 838 **** 839 *** 841 **** 842 **** 843 **** 844 *** 846 *** 848 *** 849 *** 852 **** 854 **** 855 **** 856 **** 857 **** 858 **** 859 *** 860 ** 861 *** 862 *** 863 *** 864 **** 865 ** 866 *** 867 **** 868 **** 869 **** 870 **** 871 **** 872 *** 873 *** 874 **** 875 **** 876 **** 877 *** 878 *** 879 **** 880 **** 881 **** 882 **** 883 **** 884 **** 885 *** 886 *** 887 **** 888 **** 889 **** 890 **** 891 *** 892 **** 893 **** 894 *** 895 **** 896 **** 897 **** 898 **** 899 **** 900 **** 901 **** 902 **** 903 *** 904 *** 905 ** 906 **** 907 **** 908 *** 909 **** 910 **** 911 **** 912 **** 913 **** 914 **** 915 *** 916 *** 917 **** 918 *** 919 **** 920 **** 921 **** 922 *** 923 *** 924 **** 925 ** 926 **** 929 ** 930 **** 931 *** 932 **** 935 *** 936 **** 937 **** 938 **** 939 **** 941 ** 942 ** 943 **** 944 *** 945 **** 946 **** 947 **** 949 **** 950 ** 951 ** 952 **** 953 **** 954 **** 956 ** 957 *** 958 **** 959 *** 960 ** 961 **** 962 **** 965 **** 966 **** 967 **** 968 **** 969 **** 970 *** 971 **** 972 * 976 ** 981 ** 982 **** 983 **** 984 **** 985 **** 986 ****

For compounds of Formula (I) or a form thereof disclosed herein, Table 10 provides the maximum fold (Fold) increase of Smn protein that was obtained from the 7-point concentration data generated for each test compound according to the procedure of Biological Example 7. A maximum fold increase of ≤1.2 is indicated by one star (*), a fold increase between >1.2 and ≤1.35 is indicated by two stars (**), a fold increase between >1.35 and ≤1.5 is indicated by three stars (***), a fold increase between >1.5 and ≤1.65 is indicated by four stars (****) and a fold increase >1.65 is indicated by five stars (*****).

TABLE 10 Cpd Fold 1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10 * 12 * 13 ** 14 *** 15 * 16 ** 17 ** 18 * 19 * 20 * 22 * 23 * 24 * 25 * 26 * 27 * 28 * 29 ** 30 * 31 * 34 ** 35 * 36 * 37 ** 39 *** 40 ** 41 * 42 * 43 * 45 * 47 ** 49 * 50 * 51 ***** 52 * 53 ** 54 * 55 * 56 * 57 ** 58 **** 59 ** 60 ** 61 ** 62 * 63 ** 64 * 65 * 67 * 68 ** 69 * 70 * 71 ** 72 *** 73 ** 75 * 76 * 78 *** 79 *** 80 ** 81 *** 82 ** 83 **** 84 *** 85 * 86 * 87 **** 88 *** 89 **** 90 *** 91 ** 92 *** 93 ** 94 *** 95 **** 96 *** 97 *** 98 *** 99 * 100 ** 101 ** 103 ** 104 *** 105 **** 106 * 107 **** 108 **** 109 *** 110 ** 111 ** 112 * 114 ** 115 *** 116 ** 117 **** 118 ***** 119 ** 120 **** 121 *** 122 * 123 *** 124 ** 125 * 126 * 128 *** 129 ** 130 * 131 *** 132 * 133 *** 134 *** 135 ** 136 ** 137 *** 138 ** 139 *** 140 ** 141 * 142 **** 143 *** 144 * 145 ** 146 * 147 * 148 ***** 149 *** 150 *** 151 * 152 *** 153 *** 154 * 155 * 156 ** 157 * 158 ** 159 *** 160 * 161 *** 162 *** 163 * 164 * 165 ** 166 ** 167 ** 168 * 169 *** 170 ** 171 * 172 * 173 ** 174 *** 175 * 176 * 177 * 178 * 179 *** 180 * 181 ** 182 ** 183 ** 184 *** 185 * 186 *** 187 ** 188 *** 189 ** 190 ** 191 ** 192 ** 193 ** 194 * 195 * 196 * 197 ** 198 **** 199 ** 200 * 201 ** 202 ** 203 **** 204 *** 205 *** 206 ** 207 ** 208 * 209 * 210 * 211 * 212 **** 213 *** 214 ** 215 * 216 *** 217 *** 218 ** 219 * 220 ** 221 * 222 * 223 * 224 * 225 *** 226 * 227 *** 228 ** 229 *** 230 *** 231 ** 232 * 233 *** 234 * 235 * 236 * 237 * 238 * 239 * 240 * 241 * 242 *** 243 ** 244 * 245 ** 246 *** 247 ** 248 ** 249 ** 250 *** 251 * 252 ** 253 * 254 * 255 * 256 * 257 * 258 * 259 * 260 * 261 ** 262 ** 263 * 264 * 265 * 266 * 267 * 268 * 269 * 270 ** 271 **** 272 ** 273 274 ** 275 * 276 * 277 * 278 * 279 * 280 *** 281 ** 282 * 283 * 284 * 285 * 286 * 287 * 288 * 289 * 290 * 291 * 292 *** 293 * 294 ** 295 **** 296 *** 297 * 298 * 299 * 300 * 301 * 302 *** 303 *** 304 *** 305 ** 306 *** 307 *** 308 ** 309 ** 310 ** 311 *** 312 ** 313 * 314 * 315 * 316 ** 317 * 318 * 319 ** 320 * 321 ** 322 ** 323 ** 324 *** 325 * 326 ** 327 ** 328 * 329 * 330 * 331 * 332 * 333 * 334 * 335 *** 336 * 337 * 338 ** 339 * 340 * 341 * 342 ** 343 * 344 ** 345 *** 346 ** 347 * 348 * 349 * 350 * 351 * 352 * 353 **** 354 *** 355 **** 356 ** 357 *** 358 *** 359 * 360 * 361 ** 362 ** 363 ** 364 * 365 * 366 ** 367 *** 368 ** 369 ** 370 * 371 * 372 ** 373 **** 374 * 375 ** 376 * 377 * 378 ** 379 *** 380 ** 381 * 382 * 383 **** 384 * 385 * 386 * 387 * 388 ** 389 *** 390 *** 391 ** 392 ** 393 *** 394 * 395 * 396 ** 397 * 398 * 399 * 400 * 401 * 402 * 403 * 404 **** 405 ** 406 * 407 * 408 * 409 * 410 * 411 * 412 * 413 * 414 * 415 * 416 ** 417 *** 418 **** 419 ** 420 **** 421 *** 422 ** 423 * 424 *** 425 *** 426 *** 427 *** 428 * 429 * 430 * 431 * 432 ** 433 * 434 ** 435 * 436 * 437 ** 438 *** 439 ** 440 * 441 *** 442 ** 443 **** 444 * 445 * 446 * 447 * 448 * 449 * 450 *** 451 *** 452 * 453 * 454 *** 455 **** 456 **** 457 ** 458 *** 459 *** 460 *** 461 * 462 *** 463 * 464 *** 465 * 466 * 467 * 468 ** 469 ** 470 * 471 **** 472 * 473 ** 474 * 475 * 476 ***** 477 ***** 478 * 479 * 480 * 481 * 482 **** 483 *** 484 * 485 * 486 * 487 * 488 * 489 * 490 * 491 ** 492 * 493 ***** 494 * 495 * 496 * 497 * 498 * 499 * 500 * 501 ** 502 * 503 * 504 * 505 * 506 ** 507 **** 508 ** 509 * 510 * 511 * 512 * 513 * 514 * 515 ***** 516 ***** 517 ***** 518 ***** 519 ***** 520 ** 521 ** 522 * 523 ** 524 * 525 *** 526 *** 527 **** 528 ** 529 * 530 **** 531 ** 532 * 533 **** 534 *** 535 * 536 ***** 537 ***** 538 * 539 * 540 * 541 * 542 * 543 * 544 ** 545 *** 546 * 547 * 548 * 549 ** 550 **** 551 *** 552 **** 553 * 554 ***** 555 **** 556 *** 557 *** 558 **** 559 *** 560 **** 561 **** 562 **** 563 ***** 564 ***** 565 * 566 **** 567 ***** 568 ***** 569 ***** 570 ***** 571 ** 572 **** 573 **** 574 * 575 * 576 * 577 ** 578 * 579 * 580 * 581 * 582 ** 583 ** 584 ***** 585 *** 586 *** 587 **** 588 ***** 589 ***** 590 ***** 591 ***** 592 ***** 593 ***** 594 ***** 595 ** 596 ** 597 **** 598 *** 599 *** 600 ***** 601 ***** 602 * 603 * 604 * 605 ***** 606 ***** 607 *** 608 ***** 609 ***** 610 ** 611 **** 612 ** 613 ** 614 ***** 615 **** 616 ** 617 *** 618 **** 619 **** 620 **** 621 ***** 622 **** 623 *** 624 *** 625 *** 626 **** 627 ***** 628 **** 629 * 630 * 631 * 632 ***** 633 *** 634 ***** 635 **** 636 ** 638 **** 639 * 640 **** 641 * 642 ** 643 **** 644 ***** 645 ***** 646 **** 647 **** 648 ***** 649 ***** 650 **** 651 *** 652 **** 653 *** 654 **** 655 **** 656 ***** 657 **** 658 ***** 659 **** 660 ***** 661 ***** 662 *** 663 *** 664 ***** 665 ***** 666 **** 667 **** 668 ***** 669 ***** 670 ***** 671 ***** 672 **** 673 ***** 674 ***** 675 **** 676 ***** 677 **** 678 ***** 679 ***** 680 **** 681 **** 682 *** 683 **** 684 **** 685 **** 686 ***** 687 *** 688 ***** 689 *** 690 **** 691 **** 692 **** 693 **** 694 **** 695 *** 696 ***** 697 *** 698 * 699 ***** 700 ***** 701 ** 702 * 703 ** 704 **** 705 *** 706 **** 707 **** 708 ** 709 **** 710 ** 711 *** 712 ** 713 *** 714 * 715 ** 716 **** 717 *** 718 **** 719 ** 720 ** 721 * 722 * 723 ***** 724 * 725 *** 726 **** 727 *** 728 * 729 *** 730 *** 731 *** 732 *** 733 *** 734 **** 735 **** 736 ***** 737 ***** 738 ***** 739 **** 740 ***** 741 ***** 742 ***** 743 ***** 744 ** 745 ***** 746 ***** 747 ***** 748 ***** 749 ***** 750 ***** 751 ** 752 **** 753 *** 754 *** 755 *** 756 *** 757 *** 758 * 759 *** 760 *** 761 **** 762 **** 763 **** 764 ** 765 * 766 *** 767 ***** 768 **** 769 ** 770 **** 771 * 772 ***** 773 **** 774 **** 775 **** 776 ** 777 * 778 ***** 779 ***** 780 **** 781 ** 782 **** 783 *** 784 ** 785 **** 786 **** 787 *** 788 **** 789 *** 790 ** 791 *** 792 **** 793 **** 794 **** 795 **** 796 **** 797 **** 798 **** 799 **** 800 ***** 801 **** 802 **** 803 *** 804 ***** 805 ***** 806 ***** 807 ***** 808 **** 809 **** 810 **** 811 **** 812 *** 813 **** 814 ***** 815 **** 816 **** 817 ** 818 * 819 *** 820 ** 821 ***** 822 **** 823 **** 824 **** 825 ***** 826 ***** 827 ***** 828 ***** 829 ***** 830 ***** 831 * 832 * 833 ***** 834 ***** 835 ***** 836 ***** 837 ***** 838 ***** 839 **** 840 * 841 ***** 842 ***** 843 **** 844 **** 845 * 846 ***** 847 ** 848 ***** 849 ***** 850 ** 851 *** 852 **** 853 * 854 ***** 855 ***** 856 ***** 857 ***** 858 **** 859 **** 860 **** 861 ***** 862 ***** 863 ***** 864 ***** 865 **** 866 *** 867 **** 868 ***** 869 ***** 870 **** 871 **** 872 **** 873 **** 874 ***** 875 **** 876 **** 877 *** 878 ***** 879 **** 880 **** 881 **** 882 **** 883 ***** 884 ***** 885 ***** 886 ***** 887 ***** 888 ***** 889 ***** 890 ***** 891 ***** 892 **** 893 ***** 894 ***** 895 ***** 896 ***** 897 ***** 898 ***** 899 ***** 900 ***** 901 ***** 902 ***** 903 **** 904 **** 905 **** 906 ***** 907 **** 908 ***** 909 ***** 910 ***** 911 ***** 912 **** 913 ***** 914 **** 915 **** 916 **** 917 ***** 918 **** 919 **** 920 ***** 921 **** 922 *** 923 *** 924 **** 925 *** 926 **** 927 ** 928 *** 929 *** 930 ***** 931 **** 932 **** 933 * 934 ** 935 **** 936 ***** 937 ***** 938 ***** 939 ***** 940 * 941 **** 942 *** 943 **** 944 **** 945 ***** 946 **** 947 **** 948 *** 949 ***** 950 *** 951 **** 952 ***** 953 **** 954 ***** 955 *** 956 ***** 957 **** 958 ***** 959 *** 960 *** 961 *** 962 ***** 963 *** 964 ** 965 *** 966 **** 967 **** 968 ***** 969 **** 970 ***** 971 ***** 972 *** 973 * 974 ** 975 *** 976 *** 977 * 978 ** 979 ** 980 *** 981 **** 982 ***** 983 ***** 984 ***** 985 ***** 986 *****

Example 8

Gems Count (Smn-dependent Nuclear Speckle Count) Assay

The level of Smn protein directly correlates with the amount of nuclear foci, also known as gems, produced upon staining the cell with a fluorescently labeled anti-Smn antibody (Liu and Dreyfuss, EMBO J., 1996, 15:3555). Gems are multi-protein complexes whose formation is nucleated by the Smn protein and the gems count assay is used to evaluate the level of Smn protein in the cell. As described herein, the gems count assay is used to quantify the level of Smn protein in SMA patient fibroblast cells treated with a test compound.

Materials

Material Source SMA Type 1 human cells GM03813 (Coriell Institute) Primary Antibody-mouse anti- Sigma Catalog No.: S2944 SMN clone 2B1 Secondary Antibody-anti-mouse Life Technologies, Inc. (formerly Alexa Fluor 555 Invitrogen) Catalog No.: A21422 Bovine Serum Albumin (BSA) Sigma Catalog No.: A3294 4% Paraformaldehyde Electron Microscopy Sciences Catalog No.: 15710 Bortezomib LC Labs, Catalog No.: B-1408 0.05% Triton X-100 Sigma Catalog No.: 93443-100 mL Mounting medium-ProLong Gold Life Technologies, Inc. (formerly Antifade Reagent with DAPI Invitrogen) Catalog Nos.: P7481 and P36935 22 × 22 #1 sterile Cover slips Fisher Catalog No.: 12-548-B DMEM Life Technologies, Inc. (formerly Invitrogen) Catalog No.: 11960-044 PBS Life Technologies, Inc. (formerly Invitrogen) Catalog No.: 10010-031 Clear-coat nail polish Revlon brand Catalog No.: 1271-76 Zeiss Axovert 135 Fluorescence Zeiss microscope

Protocol: Cells are thawed and incubated in DMEM-10% FBS for 72 hours, then trypsinized, counted and resuspended to 100,000 cells/mL in DMEM-10% FBS. 2 mL of the cell suspension is plated in a 6-well cell culture plate with a sterile cover slip and incubated for 3 to 5 hours. Test compounds are serially diluted 3.16-fold in 100% DMSO to generate a 7-point dilution curve. 10 μL of test compound solution is added to each cell-containing well and incubated for 48 hours in a cell culture incubator (37° C., 5% CO₂, 100% relative humidity). Duplicates are set up for each test compound concentration. Cells containing DMSO at a final concentration of 0.5% are used as controls.

Cell culture medium is aspirated from the wells containing cover slips and gently washed three times with cold PBS. The cells are fixed by incubation for 20 minutes at room temperature while in paraformaldehyde. The cells are then washed two times with cold PBS followed by incubation for 5 minutes at room temperature with 0.05% Triton X-100 in PBS to permeabilize the cells. After the fixed cells are washed three times with cold PBS, they are blocked with 10% FBS for 1 hour. 60 μL of primary antibody diluted 1:1000 in blocking buffer is added and the mixture is incubated for one hour at room temperature. The cells are washed three times with PBS and 60 μL of secondary antibody diluted 1:5000 in blocking buffer is added, then the mixture is incubated for one hour at room temperature. The cover slips are mounted onto the slides with the aid of mounting medium and allowed to dry overnight. Nail polish is applied to the sides of the cover slip and the slides are stored, protected from light. A Zeiss Axovert 135 with a 63× Plan-Apochromat, NA=1.4 objective is used for immunofluorescence detection and counting. The number of gems is counted per ≥150 nuclei and % activation is calculated using DMSO and 10 nM bortezomib as controls. For each test compound, the cells are examined at all wavelengths to identify test compounds with inherent fluorescence.

Results. As seen in FIG. 9, SMA Type 1 patient cells treated with Compound 35 (FIG. 9a) and Compound 626 (FIG. 9b) contain progressively more gems relative to cells treated with DMSO.

Example 9

Smn Protein Assay in Human Motor Neurons

Smn immunofluorescent confocal microscopy is used to quantify the level of Smn protein in human motor neurons treated with test compounds.

Protocol. Human motor neurons derived from SMA iPS cells (Ebert et al., Nature, 2009, 457:2770; and, Rubin et al., BMC Biology, 2011, 9:42) are treated with test compound at various concentrations for 72 hours. The level of Smn protein in the cell nucleus is quantified using Smn immunostaining and confocal fluorescence microscopy essentially as described in Makhortova et al., Nature Chemical Biology, 2011, 7:544. The level of Smn protein in compound-treated samples is normalized to that in vehicle-treated samples and plotted as a function of the compound concentration.

Results. As seen in FIG. 10, human motor neurons treated for 72 hours with increasing concentrations of Compound 35 (FIG. 10a) and Compound 626 (FIG. 10b) contain progressively more Smn protein in the nucleus.

Example 10

Smn Protein Assay in Animal Tissues

This Smn protein assay compares tissues from test compound treated mice with those from DMSO vehicle treated mice to determine the increase in levels of Smn protein produced from the human SMN2 gene.

Materials

Material Source Tissues from C/C-allele SMA The Jackson Laboratory, strain #008714 mice (B6.129-smn1^(tm5(Smn1/SMN2)Mrph)/J) Tissues from Δ7 SMA mice The Jackson Laboratory, strain #005025 (FVB.Cg-Tg(SMN2*delta7)4299 Ahmb Tg(SMN2)89Ahmb Smn1^(tm1Msd)/J) Protease inhibitor cocktail Roche Applied Science Catalog No.: 11836145001 Anti-SMN d2 Blue cap Cisbio Catalog No.: 63IDC002-SMN Anti-SMN kryptate Red cap Cisbio Catalog No.: 63IDC002- SMN SMN reconstitution buffer Cisbio Catalog No.: 63IDC002-SMN- Buffer RIPA Lysis Buffer 20 mM Tris-HCl pH 7.5, 150 mM NaCl, 1 mM EDTA, 1% NP-40, 1% Sodium deoxycholate Diluent Buffer 20 mM Tris-HCl pH 7.5, 150 mM NaCl BCA protein assay kit Pierce Catalog No.: 23225 White 384 well plate Nunc Catalog No.: 351190 Polypropylene V-bottom plate Falcon Catalog No.: 165195 Clear 96 well polystyrene plate Nunc Catalog No.: 442404 5 mm Stainless Steel Beads Qiagen Catalog No.: 69989 Safe-Lock Tubes 2.0 mL Eppendorf Catalog No.: 022363352 Twin.tec 96-Well Semiskirted Eppendorf Catalog No.: 951020389 PCR Plate TissueLyzer II Qiagen Catalog No.: 85300 Envision Plate Reader Perkin Elmer Model No.: 2103

Protocol. The tissue samples in Safe-Lock tubes are weighed and the volume of RIPA buffer containing the protease inhibitor cocktail is added based on the weight to volume ratios for each type of tissue: Brain (50 mg/mL), Muscle (50 mg/mL) and Spinal Cord (25 mg/mL).

Tissues are homogenized using the TissueLyzer by bead milling. 5 mm stainless steel beads are added to the sample and shaken vigorously for 5 minutes at 30 Hz in the TissueLyzer. The samples are then centrifuged for 20 minutes at 14,000×g in a microcentrifuge and the homogenates transferred to the PCR plate. The homogenates are diluted in RIPA buffer to approximately 1 mg/mL for HTRF and approximately 0.5 mg/mL for total protein measurement using the BCA protein assay. For the SMN HTRF assay, 35 μL of the tissue homogenate is transferred to a 384-well plate containing 5 μL of the antibody solution (1:100 dilution of each of the anti-SMNd2 and anti-SMN Kryptate in reconstitution buffer). To provide a control signal, three (3) wells in the plate contain only RIPA Lysis Buffer and, thus, serve as Blank control wells. The plate is centrifuged for 1 minute to bring the solution to the bottom of the wells and then incubated overnight at room temperature. Fluorescence for each well of the plate at 665 nm and 620 nm is measured on an EnVision multilabel plate reader (Perkin-Elmer). The total protein in the tissue homogenate is measured using the BCA assay according to the manufacturer's protocol.

The normalized fluorescence signal is calculated for each sample, Blank and vehicle control well by dividing the signal at 665 nm by the signal at 620 nm. Normalizing the signal accounts for possible fluorescence quenching due to the matrix effect of the tissue homogenate. The ΔF value (a measurement of Smn protein abundance) for each tissue sample well is calculated by subtracting the normalized average fluorescence for the Blank control wells from the normalized fluorescence for each tissue sample well and then dividing this difference by the normalized average fluorescence for the Blank control wells. The ΔF value for each tissue sample well is divided by the total protein quantity (determined using the BCA assay) for that tissue sample. The change in Smn protein abundance for each tissue sample relative to the vehicle control is calculated as the percent difference in the ΔF value of the tissue sample in the presence of the test compound and the averaged ΔF value of the vehicle control signal divided by the averaged ΔF value of the vehicle control signal.

Example 11

Smn Protein Assay in Tissues of Adult C/C-Allele SMA Mice

The tissues for use in the assay for Smn protein in adult C/C-allele SMA mice are prepared as described in Example 10. The assay assesses whether treatment of C/C-allele SMA mice with a test compound for 10 days increases levels of Smn protein produced from the SMN2 gene.

Materials

Material Source Tissues from C/ The Jackson Laboratory, strain #008714 (B6.129- C-allele SMA mice Smn1^(tm5(Smn1/SMN2)Mrph)/J)

Protocol. C/C-allele SMA mice are dosed twice a day orally (in 0.5% hydroxypropylmethyl cellulose (HPMC) with 0.1% Tween-80) with a test compound at 10 mg/kg for 10 days. Age-matched heterozygous mice are dosed with vehicle for use as a control. Tissues are collected for analysis of protein levels according to Example 10.

Results. As seen in FIG. 11, total protein normalized Smn level was increased in target tissues (Brain: FIG. 11a; Spinal cord: FIG. 11b; and Muscle: FIG. 11c) of adult C/C-allele SMA mice treated with Compound 35 and Compound 626 relative to the vehicle group. The dashed line in each Figure represents the average increase in normalized Smn levels of heterozygous mice relative to those in the knock out vehicle group. Test compound treatment in the C/C-allele SMA mice increased the Smn protein levels in the target tissues above those observed in the corresponding tissues of the heterozygous mice.

Example 12

Smn Protein in Tissues of Neonatal Δ7 SMA Mice

The assay for Smn protein in neonatal SMA mice tissues is used to determine whether treatment with a test compound increases Smn protein levels produced from the SMN2 gene.

Materials

Material Source Tissues from Δ7 The Jackson Laboratory, strain #005025 (FVB.Cg- SMA mice Tg(SMN2*delta7)4299Ahmb Tg(SMN2)89Ahmb Smn1^(tm1Msd)/J)

Protocol. SMA Δ7 homozygous knockout mice are dosed once a day (QD) intraperitoneally (IP) with a test compound or vehicle (100% DMSO) from postnatal day (PND) 3 to day 9. Tissues are collected for analysis of protein levels according to Example 10.

Results. As seen in FIG. 12, total protein normalized Smn level was dose dependently increased in target tissues (Brain: FIG. 12a and FIG. 12b; Spinal cord: FIG. 12c and FIG. 12d; and Muscle: FIG. 12e and FIG. 12f) of neonatal SMA Δ7 homozygous knockout mice treated with Compound 35 and Compound 626, respectively. The dashed line and grey zone in each Figure represent the average and standard deviation of the total protein normalized Smn levels in heterozygous mice.

Example 13

Body Weight of Neonatal Δ7 SMA Mice

The change in body weight of neonatal SMA mice is used to determine whether treatment with a test compound improves body weight.

Materials

Material Source Tissues from ΔExon7 The Jackson Laboratory, strain #005025 SMA mice (FVB.Cg-Tg(SMN2*delta7)4299Ahmb Tg(SMN2)89Ahmb Smn1^(tm1Msd)/J)

Protocol. SMA Δ7 homozygous knockout mice are dosed intraperitoneally (IP) with test compound or vehicle (100% DMSO) once per day (QD) from postnatal day (PND) 3 until the dose regimen is switched to an oral dose twice per day (BID) in 0.5% hydroxypropylmethyl cellulose (HPMC) with 0.1% Tween-80 at a dose 3.16-fold higher than the dose used for IP. Body weights of SMA Δ7 mice treated with test compound or vehicle and age matched heterozygous mice are recorded every day.

Results. As seen in FIG. 13, body weight of neonatal SMA Δ7 homozygous knockout mice treated with Compound 35, dosed IP QD from PND 3 to day 24, then orally BID from day 25 until study end (FIG. 13a) and Compound 626, dosed IP QD from PND 3 to day 30, then orally BID from day 31 until study end (FIG. 12b) improved compared to vehicle treated mice.

Example 14

Righting Reflex in Neonatal Δ7 SMA Mice

The functional change in righting reflex of neonatal SMA mice is used to determine whether treatment with a test compound improves righting reflex.

Materials

Material Source Tissues from ΔExon7 The Jackson Laboratory, strain #005025 SMA mice (FVB.Cg-Tg(SMN2*delta7)4299Alumb Tg(SMN2)89Ahmb Smn1^(tm1Msd)/J)

Protocol. SMA Δ7 homozygous knockout mice are dosed intraperitoneally (IP) with test compound or vehicle (100% DMSO) once per day (QD) from postnatal day (PND) 3 until the dose regimen is switched to an oral dose twice per day (BID) in 0.5% hydroxypropylmethyl cellulose (HPMC) with 0.1% Tween-80 at a dose 3.16-fold higher than the dose used for IP. The righting reflex time is measured as the time taken by a mouse to flip over onto its feet after being laid on its back. Righting reflex is measured five times for each mouse (allowing a maximal time of 30 sec for each try) with 5 minutes between each measurement. The righting reflex time for SMA Δ7 homozygous knockout mice treated with test compound or vehicle and age-matched heterozygous mice is measured on PND 10, 14 and 18 and plotted.

Results. As seen in FIG. 14, the righting reflex of neonatal SMA Δ7 homozygous knockout mice treated with Compound 35, dosed IP QD from PND 3 to day 24, then orally BID from day 25 until study end, improved compared to vehicle treated mice. The righting time of the compound treated neonatal SMA Δ7 homozygous knockout mice was similar to that of the age matched heterozygous mice on postnatal day 18.

Example 15

Survival of Neonatal Δ7 SMA Mice

The change in the number of surviving mice over time is used to determine whether treatment with a test compound improves survival.

Materials

Material Source Tissues from Δ7 The Jackson Laboratory, strain #005025 SMA mice (FVB.Cg-Tg(SMN2*delta7)4299Alumb Tg(SMN2)89Ahmb Smn1^(tm1Msd)/J)

Protocol. SMA Δ7 homozygous knockout mice are dosed intraperitoneally (IP) with test compound or vehicle (100% DMSO) once per day (QD) from postnatal day (PND) 3 until the dose regimen is switched to an oral dose twice per day (BID) in 0.5% hydroxypropylmethyl cellulose (HPMC) with 0.1% Tween-80 at a dose 3.16-fold higher than the dose used for IP. The number of surviving mice in each group is recorded every day and plotted as a percent of total number of mice. Tissues of SMA Δ7 and age-matched heterozygous mice are collected for the measurement of Smn protein levels and processed as detailed in Example 10. The total protein normalized Smn protein levels measured in the tissues are plotted as a percent of those in the age-matched heterozygous mice tissues, with the heterozygous levels represented as 100 percent. The level of Smn protein in the test compound treated mice tissue relative to that in heterozygous mice tissue is indicated as a percent value above each bar in the graph.

Results. As seen in FIG. 15, survival of neonatal SMA Δ7 homozygous knockout mice treated with Compound 35 (FIG. 15a) dosed IP QD from PND 3 to day 24, then orally BID from day 25 until study end, and Compound 626 (FIG. 15b) dosed IP QD from PND 3 to day 30, then orally BID from day 31 until study end, improved compared to vehicle treated mice.

Results. As seen in FIG. 16, Smn protein levels in target tissues (brain, FIG. 16a, and muscle, FIG. 16b) of SMA Δ7 homozygous knockout mice after treatment with Compound 35 and Compound 626 from postnatal day 3 until necropsy was measured and plotted relative to vehicle treated and age-matched heterozygous mice. As seen in FIGS. 16a and FIG. 16b, none of the vehicle treated SMA Δ7 homozygous knockout mice survived past day 22.

Without regard to whether a document cited herein was specifically and individually indicated as being incorporated by reference, all documents referred to herein are incorporated by reference into the present application for any and all purposes to the same extent as if each individual reference was fully set forth herein.

Although certain embodiments have been described in detail above, those having ordinary skill in the art will clearly understand that many modifications are possible in the embodiments without departing from the teachings thereof. All such modifications are intended to be encompassed within the claims as described herein. 

What is claimed is:
 1. A compound selected from Formula (Ia) :

or a free acid, free base, salt, stereoisomer, racemate, enantiomer, diastereomer or tautomer form thereof, wherein: R₁ is heterocyclyl selected from azetidin-1-yl, tetrahydrofuran-3-yl, pyrrolidin-1-yl, piperidin-1-yl, piperidin-4-yl, piperazin-1-yl, 1,4-diazepan-1-yl, 1,2,5,6-tetrahydropyridin-3-yl, 1,2,3,6-tetrahydropyridin-4-yl, hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, (3aR,6aR)-hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, (3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, octahydro-5H-pyrrolo[3,2-c]pyridin-5-yl, octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, hexahydropyrrolo[1,2-a]pyrazin-6(2H)-one, (7R,8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-octahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-octahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, octahydro-2H-pyrido[1,2-a]pyrazin-2-yl, 3-azabicyclo[3.1.0]hex-3-yl, 8-azabicyclo[3.2.1]oct-3-yl, (1R,5S)-8-azabicyclo[3.2.1]oct-3-yl, 8-azabicyclo[3.2.1]oct-2-en-3-yl, (1R,5S)-8-azabicyclo[3.2.1]oct-2-en-3-yl, 9-azabicyclo[3.3.1]non-3-yl, (1R,5S)-9-azabicyclo[3.3.1]non-3-yl, 2,5-diazabicyclo[2.2.1]hept-2-yl, (1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl, 2,5-diazabicyclo[2.2.2]oct-2-yl, 3,8-diazabicyclo[3.2.1]oct-3-yl, (1R,5S)-3,8-diazabicyclo[3.2.1]oct-3-yl, 1,4-diazabicyclo[3.2.2]non-4-yl, azaspiro[3.3]hept-2-yl, 2,6-diazaspiro[3.3]hept-2-yl, 2,7-diazaspiro[3.5]non-7-yl, 5,8-diazaspiro[3.5]non-8-yl, 2,7-diazaspiro[4.4]non-2-yl and 6,9-diazaspiro[4.5]dec-9-yl optionally substituted with one, two or three R₃ substituents and one additional, optional R₄ substituent; R₂ is heteroaryl selected from thien-2-yl, thien-3-yl, 1H-pyrazol-4-yl, 1H-pyrazol-5-yl, 1H-imidazol-1-yl, 1H-imidazol-4-yl, 1,2,4-oxadiazol-3-yl, pyridin-2-yl, pyridin-3-yl, pyridine-4-yl, pyrimidin-4-yl, 1H-indol-3-yl, 1H-indol-4-yl, indol-5-yl, indol-6-yl, 1H-indazol-5-yl, 2H-indazol-5-yl, indolizin-2-yl, benzofuran-2-yl, benzothien-2-yl, benzothien-3-yl, 1H-benzimidazol-6-yl, 1,3-benzoxazol-5-yl, 1,3-benzoxazol-6-yl, 1,3-benzothiazol-5-yl, 1,3-benzothiazol-6-yl, 9H-purin-8-yl, furo[3,2-b]pyridine-2-yl, furo[3,2-c]pyridine-2-yl, furo[2,3-c]pyridin-2-yl, thieno[3,2-c]pyridin-2-yl, thieno[2,3-d]pyrimidin-6-yl, 1H-pyrrolo[2,3-b]pyridin-5-yl, 1H-pyrrolo[2,3-c]pyridin-4-yl, pyrrolo[1,2-a]pyrimidin-7-yl, pyrrolo[1,2-a]pyrazin-7-yl, pyrrolo[1,2-b]pyridazin-2-yl, pyrrolo[1,2-b]pyridazin-6-yl, pyrazolo[1,5-a]pyridin-2-yl, pyrazolo[1,5-a]pyrazin-2-yl, imidazo[2,1-b][1,3]thiazol-6-yl, imidazo[2,1-b][1,3,4]thiadiazol-6-yl, [1,3]oxazolo[4,5-b]pyridin-2-yl, imidazo[1,2-a]pyridin-6-yl, imidazo[1,2-a]pyrimidin-2-yl, imidazo[1,2-a]pyrimidin-6-yl, imidazo[1,2-c]pyrimidin-2-yl, imidazo[1,2-b]pyridazin-2-yl, imidazo[1,2-b]pyridazin-6-yl, imidazo[1,2-a]pyrazin-2-yl and quinoxalin-2-yl; R₁ is heterocyclyl selected from azetidin-1-yl, tetrahydrofuran-3-yl, pyrrolidin-1-yl, piperidin-1-yl, piperidin-4-yl, piperazin-1-yl, 1,4-diazepan-1-yl, 1,2,5,6-tetrahydropyridin-3-yl, 1,2,3,6-tetrahydropyridin-4-yl, hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, (3aR,6aR)-hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, (3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, octahydro-5H-pyrrolo[3,2-c]pyridin-5-yl, octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, hexahydropyrrolo[1,2-a]pyrazin-6(2H)-one, (7R,8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-octahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-octahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, octahydro-2H-pyrido[1,2-a]pyrazin-2-yl, 3-azabicyclo[3.1.0]hex-3-yl, 8-azabicyclo[3.2.1]oct-3-yl, (1R,5S)-8-azabicyclo[3.2.1]oct-3-yl, 8-azabicyclo[3.2.1]oct-2-en-3-yl, (1R,5S)-8-azabicyclo[3.2.1]oct-2-en-3-yl, 9-azabicyclo[3.3.1]non-3-yl, (1R,5S)-9-azabicyclo[3.3.1]non-3-yl, 2,5-diazabicyclo[2.2.1]hept-2-yl, (1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl, 2,5-diazabicyclo[2.2.2]oct-2-yl, 3,8-diazabicyclo[3.2.1]oct-3-yl, (1R,5S)-3,8-diazabicyclo[3.2.1]oct-3-yl, 1,4-diazabicyclo[3.2.2]non-4-yl, azaspiro[3.3]hept-2-yl, 2,6-diazaspiro[3.3]hept-2-yl, 2,7-diazaspiro[3.5]non-7-yl, 5,8-diazaspiro[3.5]non-8-yl, 2,7-diazaspiro[4.4]non-2-yl and 6,9-diazaspiro[4.5]dec-9-yl optionally substituted with one, two or three R₃ substituents and one additional, optional R₄ substituent; R₂ is heteroaryl selected from thien-2-yl, thien-3-yl, 1H-pyrazol-4-yl, 1H-imidazol-1-yl, 1H-imidazol-4-yl, 1,2,4-oxadiazol-3-yl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl, pyrimidin-4-yl, 1H-indol-3-yl, 1H-indol-4-yl, indol-5-yl, indol-6-yl, 1H-indazol-5-yl, 2H-indazol-5-yl, indolizin-2-yl, benzofuran-2-yl, benzothien-2-yl, benzothien-3-yl, 1H-benzimidazol-6-yl, 1,3-benzoxazol-5-yl, 1,3-benzoxazol-6-yl, 1,3-benzothiazol-5-yl, 1,3-benzothiazol-6-yl, 9H-purin-8-yl, furo[3,2-b]pyridin-2-yl, furo[3,2-c]pyridin-2-yl, furo[2,3-c]pyridin-2-yl, thieno[3,2-c]pyridin-2-yl, thieno[2,3-d]pyrimidin-6-yl, 1H-pyrrolo[2,3-b]pyridin-5-yl, 1H-pyrrolo[2,3-c]pyridin-4-yl, pyrrolo[1,2-a]pyrimidin-7-yl, pyrrolo[1,2-a]pyrazin-7-yl, pyrrolo[1,2-b]pyridazin-2-yl, pyrrolo[1,2-b]pyridazin-6-yl, pyrazolo[1,5-a]pyridin-2-yl, pyrazolo[1,5-a]pyrazin-2-yl, imidazo[2,1-b][1,3]thiazol-6-yl, imidazo[2,1-b][1,3,4]thiadiazol-6-yl, [1,3]oxazolo[4,5-b]pyridin-2-yl, imidazo[1,2-a]pyridin-6-yl, imidazo[1,2-a]pyrimidin-2-yl, imidazo[1,2-a]pyrimidin-6-yl, imidazo[1,2-c]pyrimidin-2-yl, imidazo[1,2-b]pyridazin-2-yl, imidazo[1,2-b]pyridazin-6-yl, imidazo[1,2-a]pyrazin-2-yl and quinoxalin-2-yl; wherein, each heteroaryl is optionally substituted with one, two or three R₆ substituents and one additional, optional R₇ substituent; R_(a) is, in each instance, independently selected from hydrogen, halogen or C₁₋₈alkyl; R_(b) is hydrogen, halogen, C₁₋₈alkyl or C₁₋₈alkoxy; R₃ is, in each instance, independently selected from cyano, halogen, hydroxy, oxo, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkyl-carbonyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, C₁₋₈alkoxy-C₁₋₈alkyl, C₁₋₈alkoxy-carbonyl, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, amino-C₁₋₈alkyl, C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, amino-C₁₋₈alkyl-amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino, C₁₋₈alkyl-carbonyl-amino, C₁₋₈-₈ alkoxy-carbonyl-amino, hydroxy-C ₁₋₈ alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈ alkyl, hydroxy-C ₁₋₈ alkyl-amino, (hydroxy-C ₁₋₈ alkyl)₂-amino or (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino; R₄ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-C₁₋₈alkyl, C₃₋₁₄cycloalkyl-amino, aryl-C₁₋₈alkyl, aryl-C₁₋₈alkoxy-carbonyl, heterocyclyl or heterocyclyl-C ₁₋₈ alkyl; wherein, each instance of C₃₋₁₄cycloalkyl, aryl and heterocyclyl is optionally substituted with one, two or three R₅ substituents; R₅ is, in each instance, independently selected from halogen, hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio; R₆ is, in each instance, independently selected from halogen, hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio; and, R₇ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-oxy, aryl, heterocyclyl or heteroaryl.
 2. The compound of claim 1, wherein the salt form is a chloride, hydrochloride, dihydrochloride, hydrobromide, acetate or trifluoroacetate salt.
 3. A compound, wherein the compound is selected from: 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-benzoxazol-2-yl]-2H-chromen-2-one; 7-(piperazin-1-yl)-3-[7-(trifluoromethyl)-1,3-benzoxazol-2-yl]-2H-chromen-2-one; 2-oxo-N-phenyl-7-(piperazin-1-yl)-2H-chromene-3-carboxamide; 3-(1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(7-chloro-1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperazin-1-ylmethyl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-[(propan-2-ylamino)methyl]-2H-chromen-2-one; 7-[(propan-2-ylamino)methyl]-3-[4-(trifluoromethyl)-1,3-benzothiazol-2-yl]-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(propan-2-ylamino)methyl]-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-[3-(trifluoromethyl)phenyl]-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(pyridin-3-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-[(dimethylamino)methyl]-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(dimethylamino)methyl]-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-[4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperidin-4-yl)-2H-chromen-2-one; 3-(5-fluoro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzoxazol-2-yl)-7-(piperidin-4-yloxy)-2H-chromen-2-one; 3-(4-methyl-1,3-benzoxazol-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(4-methyl-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzoxazol-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(3-fluorophenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(pyridin-4-yl)-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(4-methylpiperazin-1-yl)carbonyl]-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(1H-pyrazol-5-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2-oxo-N-phenyl-2H-chromene-3-carboxamide; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(4-methyl-1,3-benzoxazol-2-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(pyridin-2-ylamino)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(pyrimidin-2-ylamino)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[2-(propan-2-ylamino)ethyl]-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[3-(propan-2-ylamino)propyl]-2H-chromen-2-one; 3-(4-methyl-1,3-thiazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1-methyl-1H-pyrazol-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(4-fluoro-1,3-benzoxazol-2-yl)-2H-chromen-2-one; 3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-2-oxo-2H-chromen-7-yl piperazine-1-carboxylate; 3-(4-chloro-1,3-benzothiazol-2-yl)-2-oxo-2H-chromen-7-yl piperazine-1-carboxylate; benzyl 4-[3-(1-methyl-1H-benzimidazol-2-yl)-2-oxo-2H-chromen-7-yl]piperazine-1-carboxylate; 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(4-phenyl-1,3-thiazol-2-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-(piperidin-4-yloxy)-2H-chromen-2-one; 3-(1,3-benzoxazol-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(1,3-benzoxazol-2-yl)-7-[3-(dimethylamino)pyrrolidin-1-yl]-2H-chromen-2-one; 3-(1,3-benzoxazol-2-yl)-7-{[2-(dimethylamino)ethyl](methyl)amino}-2H-chromen-2-one; 3-(5-phenyl-1,2,4-oxadiazol-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(pyridin-3-ylamino)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one 3-(1,3-benzothiazol-2-yl)-7-[(3S)-pyrrolidin-3-yloxy]-2H-chromen-2-one 3-(1,3-benzothiazol-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one 3-(1,3-benzothiazol-2-yl)-7-[(2S)-pyrrolidin-2-ylmethoxy]-2H-chromen-2-one 3-(1,3-benzothiazol-2-yl)-7-[(diethylamino)methyl]-2H-chromen-2-one 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(diethylamino)methyl]-2H-chromen-2-one 3-(1,3-benzothiazol-2-yl)-7-(piperidin-1-ylmethyl)-2H-chromen-2-one 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperidin-1-ylmethyl)-2H-chromen-2-one 3-[(3-methylpyridin-2-yl)amino]-7-(piperazin-1-yl)-2H-chromen-2-one 3-[(4-methylpyridin-2-yl)amino]-7-(piperazin-1-yl)-2H-chromen-2-one 3-[(5-methylpyridin-2-yl)amino]-7-(piperazin-1-yl)-2H-chromen-2-one 3-[(6-methylpyridin-2-yl)amino]-7-(piperazin-1-yl)-2H-chromen-2-one 3-[(5-chloropyridin-2-yl)amino]-7-(piperazin-1-yl)-2H-chromen-2-one 7-(piperazin-1-yl)-3-(pyridin-3-ylamino)-2H-chromen-2-one 3-(4-iodo-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4-chloro-1,3-benzoxazol-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(4-chloro-1,3-benzoxazol-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(4-chloro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(1-methyl-1H-pyrazol-3-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(1-phenyl-1H-pyrazol-3-yl)-2H-chromen-2-one; 3-(phenylamino)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)pyridin-2-yl]-2H-chromen-2-one; 3-(3-methoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-[(methylamino)methyl]-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-{[(2-hydroxyethyl)(methyl)amino]methyl}-2H-chromen-2-one; 3-(4-methyl-1H-pyrazol-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzoxazol-2-yl)-7-(2,5-diazabicyclo[2.2.1]hept-2-yl)-2H-chromen-2-one; 3-(1,3-benzoxazol-2-yl)-7-(2,5-dimethylpiperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-[6-(trifluoromethyl)pyridin-2-yl]-2H-chromen-2-one; 3-(1H-indazol-5-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(2R,5S)-2,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-{[(1,3-dihydroxypropan-2-yl)amino]methyl}-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-propylpiperazin-1-yl)-2H-chromen-2-one; 7-[4-(2-hydroxyethyl)piperazin-1-yl]-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-[4-(2-hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; tert-butyl {(3S)-1-[3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-2-oxo-2H-chromen-7-yl]pyrrolidin-3-yl}carbamate; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-propylpiperazin-1-yl)-2H-chromen-2-one; 3-([1,3]oxazolo[4,5-b]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-([1,3]oxazolo[4,5-b]pyridin-2-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyridin-2-yl)-4-methyl-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(5-chloropyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(4-propylpiperazin-1-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[4-(2-hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-2H-chromen-2-one; 3-(7-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 7-(piperazin-1-yl)-3-[2-(trifluoromethyl)pyridin-3-yl]-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-[2-(trifluoromethyl)pyridin-3-yl]-2H-chromen-2-one; 3-(3-fluoropyridin-4-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-{[(3R)-1-ethylpyrrolidin-3-yl]oxy}-2H-chromen-2-one; 3-(imidazo[1,2-b]pyridazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-{[2-(dimethylamino)ethyl](methyl)amino}-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(5-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(5-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,4,5-trimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,4,5-trimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-[1-(dimethylamino)ethyl]-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-[1-(propan-2-ylamino)ethyl]-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-7-{[2-(dimethylamino)ethyl](methyl)amino}-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-4-methyl-7-(piperazin-1-yl)-2H-chromen-2-one; 7-{[(2-hydroxyethyl)(methyl)amino]methyl}-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-[3-(dimethylamino)pyrrolidin-1-yl]-3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 8-fluoro-7-(piperazin-1-yl)-3-(pyridin-2-yl)-2H-chromen-2-one; 8-fluoro-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-6-fluoro-7-(piperazin-1-yl)-2H-chromen-2-one; 6-fluoro-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzoxazol-2-yl)-5-fluoro-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzothiazol-2-yl)-5-fluoro-7-(piperazin-1-yl)-2H-chromen-2-one; 5-fluoro-7-(piperazin-1-yl)-3-(pyridin-2-yl)-2H-chromen-2-one; 5-fluoro-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-methylpyridin-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(6-methylpyridin-3-yl)-2H-chromen-2-one; 3-(2-methoxypyridin-4-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(2R,5S)-2,5-dimethylpiperazin-1-yl]-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-7-[(3R,5S)-3,4,5-trimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-{[2-(dimethylamino)ethyl](methyl)amino}-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; tert-butyl {(3S)-1-[3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2-oxo-2H-chromen-7-yl]pyrrolidin-3-yl}carbamate; 7-(4-ethylpiperazin-1-yl)-3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-(2-chloropyridin-4-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[methyl(1-methylpyrrolidin-3-yl)amino]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-[4-(2-hydroxyethyl)piperazin-1-yl]-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(2,5-diazabicyclo[2.2.2]oct-2-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(4-propylpiperazin-1-yl)-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-[4-(propan-2-yl)piperazin-1-yl]-3-(pyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(piperidin-4-yloxy)-2H-chromen-2-one; 7-[(dimethylamino)methyl]-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(propan-2-ylamino)methyl]-2H-chromen-2-one; 7-[3-(dimethylamino)piperidin-1-yl]-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-{[2-(dimethylamino)ethyl](methyl)amino}-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-propylpiperazin-1-yl)-2H-chromen-2-one; 2-[7-(4-methylpiperazin-1-yl)-2-oxo-2H-chromen-3-yl]imidazo[1,2-a]pyridine-6-carbonitrile; 7-(piperazin-1-yl)-3-[8-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-[8-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[8-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(3,3-dimethylpiperazin-1-yl)-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6-methoxypyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-aminopiperidin-1-yl)-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[methyl(pyridin-3-ylmethyl)amino]-2H-chromen-2-one; 7-(3,3-dimethylpiperazin-1-yl)-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-{[2-(dimethylamino)ethyl](methyl)amino}-3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-(4-methoxypyridin-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4-chloropyridin-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one; 7-[(3R)-3-methylpiperazin-1-yl]-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 3-(8-cyclopropylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(8-bromoimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(3,3-dimethylpiperazin-1-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-{[(1-hydroxypropan-2-yl)amino]methyl}-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(4-hydroxypiperidin-1-yl)methyl]-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3-hydroxypyrrolidin-1-yl)methyl]-3-(6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 5-fluoro-7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-benzoxazol-2-yl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-(octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)-2H-chromen-2-one; 3-(2-ethoxypyridin-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-methoxypyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(1-methyl-1H-indol-3-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1-methyl-1H-indol-3-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one; 7-[(3R)-3-methylpiperazin-1-yl]-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 7-(3,3-dimethylpiperazin-1-yl)-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-{[(1-hydroxypropan-2-yl)amino]methyl}-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-{[(2-hydroxyethyl)(methyl)amino]methyl}-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(3-hydroxypyrrolidin-1-yl)methyl]-2H-chromen-2-one; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-[(4-hydroxypiperidin-1-yl)methyl]-2H-chromen-2-one; 3-(2-methylpyrimidin-4-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 7-[(2R,5S)-2,5-dimethylpiperazin-1-yl]-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 3-(2-cyclopropylpyrimidin-4-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-[2-(propan-2-yl)pyrimidin-4-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[methyl(1-methylpiperidin-4-yl)amino]-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-(4-methyl-1,3-thiazol-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(4-methyl-1,3-thiazol-2-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(4-methyl-1,3-thiazol-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(4-methyl-1,3-thiazol-2-yl)-2H-chromen-2-one; 3-(7-ethylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(7-ethylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(7-ethylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(3,5-difluorophenyl)-5-fluoro-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(3,5-difluorophenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 5-fluoro-3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-[8-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 3-(6-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(2-methylpyrimidin-4-yl)-2H-chromen-2-one; 3-(2-cyclopropylpyrimidin-4-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(2S,5R)-2,5-dimethylpiperazin-1-yl]-3-(4-methyl-1,3-thiazol-2-yl)-2H-chromen-2-one; 7-[(3R)-3-methylpiperazin-1-yl]-3-(4-methyl-1,3-thiazol-2-yl)-2H-chromen-2-one; 7-(3,3-dimethylpiperazin-1-yl)-3-(4-methyl-1,3-thiazol-2-yl)-2H-chromen-2-one; 3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(3,3-dimethylpiperazin-1-yl)-3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R)-3-methylpiperazin-1-yl]-3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-7-(4-propylpiperazin-1-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(5-methylpyrazolo[1,5-a]pyridin-2-yl)-2H-chromen-2-one; 5-fluoro-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 5-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1H-benzimidazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(9H-purin-8-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-methoxypyridin-2-yl)-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(4-methylthiophen-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(thiophen-3-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(thiophen-3-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(6-fluoro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-fluoro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-fluoro-8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-fluoro-8-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-ethyl-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(7-ethylimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(8-ethyl-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 5-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-5-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-ethyl-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8-ethyl-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-chloro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-chloro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(8-chloro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-{[(2-hydroxyethyl)(methyl)amino]methyl}-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-[(4-hydroxypiperidin-1-yl)methyl]-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-[4-(2-hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 5-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-5-fluoro-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-ethylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-methoxypyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(6-methoxypyridin-2-yl)-2H-chromen-2-one; 3-(6-methoxypyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-methoxypyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(thiophen-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(thiophen-2-yl)-2H-chromen-2-one; 3-(3,5-difluorophenyl)-5-fluoro-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 5-fluoro-3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-5-fluoro-3-(4-fluoro-1,3-benzoxazol-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-5-fluoro-3-(4-fluoro-1,3-benzoxazol-2-yl)-2H-chromen-2-one; 5-fluoro-3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(1H-benzimidazol-2-yl)-5-fluoro-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(1H-benzimidazol-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-5-fluoro-2H-chromen-2-one; 5-fluoro-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 5-fluoro-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(1H-benzimidazol-2-yl)-7-(1,4-diazepan-1-yl)-5-fluoro-2H-chromen-2-one; 3-(1H-benzimidazol-2-yl)-5-fluoro-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-chloroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(1-benzylpyrrolidin-3-yl)(methyl)amino]-3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6-fluoropyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-ethoxypyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 7-(piperazin-1-yl)-3-[6-(propan-2-yloxy)pyridin-2-yl]-2H-chromen-2-one; 7-(piperazin-1-yl)-3-[6-(pyrrolidin-1-yl)pyridin-2-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(3,5-dimethoxyphenyl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-5-fluoro-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-5-fluoro-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-5-fluoro-3-[7-(trifluoromethyl)imidazo[1,2-a]pyridin-2-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-5-fluoro-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-5-fluoro-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(4-methyl-1H-benzimidazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(5-fluoro-1H-benzimidazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1H-benzimidazol-2-yl)-7-[(dimethylamino)methyl]-2H-chromen-2-one; 5-fluoro-7-(hydroxymethyl)-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-[8-(methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl]-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-[8-(methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[8-(methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl]-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-[8-(methylsulfanyl)imidazo[1,2-a]pyrazin-2-yl]-2H-chromen-2-one; 3-(8-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(8-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-5-fluoro-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-5-fluoro-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-5-fluoro-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(1-benzothiophen-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1-benzothiophen-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(1-benzothiophen-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(1-benzothiophen-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3,5-dimethoxyphenyl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(3,5-dimethoxyphenyl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3,5-dimethoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-[6-(cyclobutyloxy)pyridin-2-yl]-7-(piperazin-1-yl)-2H-chromen-2-one; 3-[6-(cyclobutyloxy)pyridin-2-yl]-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-5-fluoro-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8-methoxyimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(8-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 5-fluoro-3-(imidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 5-fluoro-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 5-fluoro-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(3,3-dimethylpiperazin-1-yl)-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(2-ethylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(2-ethylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(2-ethylimidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 3-(2-ethylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(7-methoxyimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-[1-(pyridin-2-yl)-1H-imidazol-4-yl]-2H-chromen-2-one; 3-(7-methoxyimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(7-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(7-methoxyimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-[(1R,5S,6s)-6-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(imidazo[2,1-b][1,3]thiazol-6-yl)-2H-chromen-2-one; 7-[(1R,5S,6s)-6-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-(pyridin-2-yl)-2H-chromen-2-one; 3-[6-(methylsulfanyl)pyridin-2-yl]-7-(piperazin-1-yl)-2H-chromen-2-one; 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(3,4-dimethoxyphenyl)-5-fluoro-2H-chromen-2-one; 3-(4-methoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4-methoxyphenyl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(4-methoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(1-phenyl-1H-imidazol-4-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-[2-methyl-1-(pyridin-2-yl)-1H-imidazol-4-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(imidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrazin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyrazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-c]pyrimidin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(imidazo[1,2-c]pyrimidin-2-yl)-2H-chromen-2-one; 3-(imidazo[1,2-c]pyrimidin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(quinoxalin-2-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-5-fluoro-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2,4-dimethoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(2,4-dimethoxyphenyl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2,4-dimethoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 5-fluoro-3-(6-methoxypyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 5-fluoro-3-(6-methoxypyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-{[2-(dimethylamino)ethyl]amino}-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(3,4-dimethoxyphenyl)-7-[(2S)-2-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2-chloroimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(1-methylpiperidin-4-yl)amino]-2H-chromen-2-one; 7-{[3-(dimethylamino)propyl]amino}-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(2-chloroimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(2-chloroimidazo[2,1-b][1,3]thiazol-6-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2-methylimidazo[2,1-b][1,3,4]thiadiazol-6-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3-chloro-4-fluorophenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(3-chloro-4-fluorophenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-benzodioxol-5-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-benzodioxol-5-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-benzodioxol-5-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-benzodioxol-5-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-[3-(trifluoromethyl)phenyl]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one; 3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(2-chloroimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-(piperidin-4-ylamino)-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin-3-ylamino]-2H-chromen-2-one; 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6-fluoroimidazo[1,2-a]pyrimidin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-cyclopropyl-8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(8-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(3,8-diazabicyclo[3.2.1]oct-3-yl)-3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(3,3-dimethylpiperazin-1-yl)-3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(3,3-dimethylpiperazin-1-yl)-3-(6-fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(3-chlorophenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2-chloro-4-fluorophenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3-methylphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(3-methylphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2,3-dihydro-1,4-benzodioxin-6-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2,3-dihydro-1,4-benzodioxin-6-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(3,8-diazabicyclo[3.2.1]oct-3-yl)-2H-chromen-2-one; 3-(8-chloroimidazo[1,2-a]pyridin-2-yl)-7-(2,5-diazabicyclo[2.2.2]oct-2-yl)-2H-chromen-2-one; 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(indolizin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(6,8-difluoroimidazo[1,2-a]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(1R,5S)-8-methyl-3,8-diazabicyclo[3.2.1]oct-3-yl]-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3,5-difluoro-2-methoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(3,5-difluoro-2-methoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3,5-difluoro-2-methoxyphenyl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(4-methoxy-3-methylphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4-methoxy-3-methylphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(4-methoxy-3-methylphenyl)-2H-chromen-2-one; 3-(3-fluoro-4-methoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(3-fluoro-4-methoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2,3-difluorophenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-[6-(dimethylamino)pyridin-3-yl]-7-(piperazin-1-yl)-2H-chromen-2-one; 3-[6-(dimethylamino)pyridin-3-yl]-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-(pyridin-4-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-5-fluoro-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(indolizin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 7-(1,4-diazabicyclo[3.2.2]non-4-yl)-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4-ylamino)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-pyrrolidin-3-ylamino]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-pyrrolidin-3-ylamino]-2H-chromen-2-one; 3-(indolizin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(3-methoxy-4-methylphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(3-methoxy-4-methylphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(4-fluoro-3-methoxyphenyl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4-fluoro-3-methoxyphenyl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-7-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(piperazin-1-yl)-3-(pyrrolo[1,2-a]pyrimidin-7-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(pyrrolo[1,2-a]pyrimidin-7-yl)-2H-chromen-2-one; 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-pyrrolidin-3-ylamino]-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-pyrrolidin-3-ylamino]-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin-3-ylamino]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(8-fluoroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R)-3-methylpiperazin-1-yl]-3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-(4-methylpiperazin-1-yl)-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 5-fluoro-7-(4-methyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 5-fluoro-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 5-fluoro-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 7-(5,8-diazaspiro[3.5]non-8-yl)-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(6,9-diazaspiro[4.5]dec-9-yl)-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(2,5-diazabicyclo[2.2.2]oct-2-yl)-3-(7-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(5,8-diazaspiro[3.5]non-8-yl)-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(6,9-diazaspiro[4.5]dec-9-yl)-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 7-(2,5-diazabicyclo[2.2.2]oct-2-yl)-3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(1-benzofuran-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1-benzofuran-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(1-benzofuran-2-yl)-7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R,5S)-3,4,5-trimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-[6-methyl-8-(trifluoromethyl)imidazo[1,2-a]pyrazin-2-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-5-fluoro-2H-chromen-2-one; 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(8-fluoro-6-methylimidazo[1,2-a]pyridin-2-yl)-7-(8-methyl-3,8-diazabicyclo[3.2.1]oct-3-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-5-fluoro-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[methyl(1-methylpyrrolidin-3-yl)amino]-2H-chromen-2-one; 7-[(1-benzylpyrrolidin-3-yl)(methyl)amino]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-methylimidazo[1,2-b]pyridazin-2-yl)-2H-chromen-2-one; 7-(4-ethyl-1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(azetidin-3-ylamino)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{methyl[(3S)-pyrrolidin-3-yl]amino}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-ethylpiperazin-1-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-b]pyridazin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-ethyl-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(3S)-4-ethyl-3-methylpiperazin-1-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-(thieno[3,2-c]pyridin-2-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(thieno[3,2-c]pyridin-2-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(6-methylimidazo[1,2-b]pyridazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[(3R)-3-methylpiperazin-1-yl]-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(2-methylpyrrolo[1,2-b]pyridazin-6-yl)-2H-chromen-2-one; 7-(4-ethylpiperazin-1-yl)-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(2-methylpyrrolo[1,2-b]pyridazin-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(1-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3S)-3-methylpiperazin-1-yl]-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(2-hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{methyl[(3S)-1-methylpyrrolidin-3-yl]amino}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3S)-1-methylpyrrolidin-3-yl]amino}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)-1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 7-[(3S)-3,4-dimethylpiperazin-1-yl]-5-fluoro-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-2H-chromen-2-one; 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 7-(4-methyl-1,4-diazepan-1-yl)-3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3-ethylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-(4-ethyl-1,4-diazepan-1-yl)-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(4-ethyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(4-ethylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3-ethyl-4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-4-ethyl-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-(octahydro-2H-pyrido[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[4-(2-hydroxyethyl)piperazin-1-yl]-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(2-hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aS,6aS)-5-methylhexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl]-2H-chromen-2-one; 7-[(3R)-3-(dimethylamino)pyrrolidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 7-[(3R)-3-(dimethylamino)pyrrolidin-1-yl]-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3S)-4-ethyl-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(2-methyl-1,3-benzoxazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H-chromen-2-one; 7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(5-methylfuro[3,2-b]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{methyl[(3R)-pyrrolidin-3-yl]amino}-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(6-methyl-8-nitroimidazo[1,2-a]pyridin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3-exo)-9-methyl-9-azabicyclo[3.3.1]non-3-yl]amino}-2H-chromen-2-one; 3-(6-methyl-8-nitroimidazo[1,2-a]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aR)-1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-2H-chromen-2-one; 3-(2,4-dimethylthieno[2,3-d]pyrimidin-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aS,6aS)-1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{methyl[(3R)-1-methylpyrrolidin-3-yl]amino}-2H-chromen-2-one; 7-[(3R)-3-(dimethylamino)pyrrolidin-1-yl]-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(4-aminopiperidin-1-yl)-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[4-(dimethylamino)piperidin-1-yl]-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[4-(dimethylamino)piperidin-1-yl]-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 7-[(3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 7-[(3R,5S)-3,5-dimethylpiperazin-1-yl]-3-(5-methylfuro[3,2-b]pyridin-2-yl)-2H-chromen-2-one; 7-[(8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(5-methylfuro[3,2-b]pyridin-2-yl)-2H-chromen-2-one; 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(5-methylfuro[3,2-b]pyridin-2-yl)-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; tert-butyl {(3S)-1-[3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2-oxo-2H-chromen-7-yl]pyrrolidin-3-yl}carbamate; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3S)-3-(propan-2-ylamino)pyrrolidin-1-yl]-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3R)-3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-{[(1R,5S)-9-methyl-9-azabicyclo[3.3.1]non-3-yl]amino}-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3 aS,6aS)-1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-methylpyrrolidin-3-yl]amino}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-ethylpyrrolidin-3-yl]amino}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-(2-hydroxyethyl)pyrrolidin-3-yl]amino}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-(propan-2-yl)pyrrolidin-3-yl]amino}-2H-chromen-2-one; 7-[(3R,4R)-3-(dimethylamino)-4-hydroxypyrrolidin-1-yl]-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[3-(diethylamino)pyrrolidin-1-yl]-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3,3-dimethylpiperazin-1-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(3,3,4-trimethylpiperazin-1-yl)-2H-chromen-2-one; 7-[(3S,4S)-3-(dimethylamino)-4-hydroxypyrrolidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3′S,4′S)-4′-hydroxy-1,3′-bipyrrolidin-1′-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1,2,3,6-tetrahydropyridin-4-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)-5-(2-hydroxyethyl)hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)-5-(propan-2-yl)hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H-chromen-2-one; 7-(2,5-diazabicyclo[2.2.1]hept-2-yl)-3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-ethylpiperazin-1-yl)-5-fluoro-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3aR,6aS)-5-ethylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1-methylpiperidin-4-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1-ethylpiperidin-4-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(2-hydroxyethyl)piperidin-4-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3′R,4′R)-4′-hydroxy-1,3′-bipyrrolidin-1′-yl]-2H-chromen-2-one; 7-(4-cyclopropylpiperazin-1-yl)-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(3-methylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(propan-2-yl)-1,4-diazepan-1-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[4-(propan-2-yl)-1,4-diazepan-1-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3aR,6aR)-1-methylhexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3aR,6aS)-5-methylhexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[3-(morpholin-4-yl)pyrrolidin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(7R,8aS)-7-hydroxyhexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8-methoxy-6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8-hydroxy-6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(1R,5S,6s)-6-(dimethylamino)-3-azabicyclo[3.1.0]hex-3-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(4-cyclopropylpiperazin-1-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4-ethylpiperazin-1-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(7R,8aS)-7-hydroxyhexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3S)-3-methyl-4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(2-methyl-1,3-benzothiazol-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(2-methyl-1,3-benzothiazol-6-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(1,4-diazepan-1-yl)-3-(2-methyl-1,3-benzothiazol-6-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-ethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(propan-2-yl)piperidin-4-yl]-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[4-(2-hydroxyethyl)piperazin-1-yl]-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(4-methyl-1,4-diazepan-1-yl)-2H-chromen-2-one; 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(2-methyl-1,3-benzothiazol-6-yl)-2H-chromen-2-one; 7-[(3S)-4-ethyl-3-methylpiperazin-1-yl]-3-(2-methyl-1,3-benzothiazol-6-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-ethyl-4-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[(3S)-3,4-diethylpiperazin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)-1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 7-(2,5-diazabicyclo[2.2.1]hept-2-yl)-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 7-[4-(aminomethyl)piperidin-1-yl]-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)-1-(2-hydroxyethyl)octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aR,7aR)-1-ethyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(1S,4S)-5-methyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(4-ethylpiperazin-1-yl)-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-{4-[(propan-2-ylamino)methyl]piperidin-1-yl}-2H-chromen-2-one; 3-(6-chloro-8-methylimidazo[1,2-a]pyrazin-2-yl)-7-[(1S,4S)-5-ethyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(1S,4S)-5-ethyl-2,5-diazabicyclo[2.2.1]hept-2-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aS,7aS)-1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aS,7aS)-1-(2-hydroxyethyl)octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 7-[(3R,5S)-4-ethyl-3,5-dimethylpiperazin-1-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(4-cyclopropylpiperazin-1-yl)-3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[4-(2-methoxyethyl)piperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1-methyl-1,2,3,6-tetrahydropyridin-4-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(2-hydroxyethyl)-1,2,3,6-tetrahydropyridin-4-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(propan-2-yl)-1,2,3,6-tetrahydropyridin-4-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4aS,7aS)-1-ethyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(3S)-3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(3R)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-[(3R)-3,4-dimethylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-methyl-3-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-ethyl-3-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 7-(4-cyclopropylpiperazin-1-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(4-tert-butylpiperazin-1-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-7-[(3R)-3-methyl-4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 7-(4-cyclobutylpiperazin-1-yl)-3-(1,3-dimethylpyrrolo[1,2-a]pyrazin-7-yl)-2H-chromen-2-one; 3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-7-(4-propylpiperazin-1-yl)-2H-chromen-2-one; 7-[4-(cyclopropylmethyl)piperazin-1-yl]-3-(5,7-dimethylfuro[2,3-c]pyridin-2-yl)-2H-chromen-2-one; 3-(4,6-dimethylthieno[3,2-c]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 7-(2-methylimidazo[1,2-a]pyridin-6-yl)-3-(piperazin-1-yl)-2H-chromen-2-one; 3-(4,6-dimethylthieno[3,2-c]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(4,6-dimethylthieno[3,2-c]pyridin-2-yl)-7-[4-(2-methoxyethyl)piperazin-1-yl]-2H-chromen-2-one; 7-(1-cyclobutylpiperidin-4-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(4-cyclobutylpiperazin-1-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(oxetan-3-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(8-ethyl-6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-(piperidin-4-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-(1-methylpiperidin-4-yl)-2H-chromen-2-one; 7-(1-ethylpiperidin-4-yl)-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyridin-6-yl)-7-[1-(oxetan-3-yl)piperidin-4-yl]-2H-chromen-2-one; 7-[1-(2-hydroxyethyl)piperidin-4-yl]-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 3-(8-ethyl-6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(4,6-dimethylfuro[3,2-c]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(4,6-dimethylfuro[3,2-c]pyridin-2-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-7-(piperidin-4-yl)-2H-chromen-2-one; 3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-7-(1-methylpiperidin-4-yl)-2H-chromen-2-one; 7-(1-ethylpiperidin-4-yl)-3-(2-methylimidazo[1,2-a]pyrimidin-6-yl)-2H-chromen-2-one; 7-[4-(2-hydroxyethyl)piperazin-1-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(4-cyclobutylpiperazin-1-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(oxetan-3-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(4,6-dimethylfuro[3,2-c]pyridin-2-yl)-7-[4-(propan-2-yl)piperazin-1-yl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(1-methylpiperidin-4-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1-propylpiperidin-4-yl)-2H-chromen-2-one; 7-[1-(2-hydroxyethyl)piperidin-4-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(1-ethylpiperidin-4-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-[2-methyl-3-(1,2,3,6-tetrahydropyridin-4-yl)imidazo[1,2-b]pyridazin-6-yl]-7-(1,2,3,6-tetrahydropyridin-4-yl)-2H-chromen-2-one; 7-[(dimethylamino)methyl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-1-ylmethyl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperazin-1-ylmethyl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(4-methylpiperazin-1-yl)methyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(propan-2-ylamino)methyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1H-imidazol-1-ylmethyl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-ethyl-3-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(4,6-dimethylpyrazolo[1,5-a]pyrazin-2-yl)-7-(1-ethylpiperidin-4-yl)-2H-chromen-2-one; 7-(1-cyclopropylpiperidin-4-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(oxetan-3-yl)piperidin-4-yl]-2H-chromen-2-one; 3-(2-methyl-2H-indazol-5-yl)-7-(piperidin-4-yl)-2H-chromen-2-one; 7-[3-(dimethylamino)propyl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(propan-2-ylamino)propyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(piperazin-1-yl)propyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(4-methylpiperazin-1-yl)propyl]-2H-chromen-2-one; 7-[1-(2-hydroxyethyl)piperidin-4-yl]-3-(2-methyl-2H-indazol-5-yl)-2H-chromen-2-one; 3-(2-methyl-2H-indazol-5-yl)-7-(1-methylpiperidin-4-yl)-2H-chromen-2-one; 7-(1-ethylpiperidin-4-yl)-3-(2-methyl-2H-indazol-5-yl)-2H-chromen-2-one; 7-[2-(dimethylamino)ethyl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(propan-2-ylamino)ethyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(piperazin-1-yl)ethyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(1-methylpiperidin-4-yl)oxy]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4-yl)-2H-chromen-2-one; 7-(1-cyclobutylpiperidin-4-yl)-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2-hydroxyethyl)amino]ethyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2-hydroxyethyl)(methyl)amino]ethyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(1-hydroxypropan-2-yl)amino]ethyl}-2H-chromen-2-one; 7-{2-[(1,3-dihydroxypropan-2-yl)amino]ethyl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2R)-2-(hydroxymethyl)pyrrolidin-1-yl]ethyl}-2H-chromen-2-one; 7-{2-[bis(2-hydroxyethyl)amino]ethyl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[2-(dimethylamino)ethoxy]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(propan-2-ylamino)ethoxy]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(oxetan-3-yl)piperidin-4-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(2-hydroxyethyl)amino]propyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(2-hydroxyethyl)(methyl)amino]propyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(1-hydroxypropan-2-yl)amino]propyl}-2H-chromen-2-one; 7-{3-[(1,3-dihydroxypropan-2-yl)amino]propyl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(2R)-2-(hydroxymethyl)pyrrolidin-1-yl]propyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(morpholin-4-yl)propyl]-2H-chromen-2-one; 7-{3-[bis(2-hydroxyethyl)amino]propyl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(morpholin-4-yl)ethyl]-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-(1-propylpiperidin-4-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-(2-hydroxyethyl)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-methylpyrrolidin-3-yl]oxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-ethylpyrrolidin-3-yl]oxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-(propan-2-yl)pyrrolidin-3-yl]oxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-(2-hydroxyethyl)pyrrolidin-3-yl]oxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[(3R)-1-(1-hydroxypropan-2-yl)pyrrolidin-3-yl]oxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-(2-fluoroethyl)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[2-(diethylamino)ethoxy]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-{2-[bis(2-hydroxyethyl)amino]ethoxy}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(piperidin-4-yloxy)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(1-ethylpiperidin-4-yl)oxy]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[1-(2-hydroxyethyl)piperidin-4-yl]oxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-(3-fluoropropyl)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{[1-(propan-2-yl)piperidin-4-yl]oxy}-2H-chromen-2-one; 7-[4-(dimethylamino)butyl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{4-[(2-hydroxyethyl)(methyl)amino]butyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{4-[(2R)-2-(hydroxymethyl)pyrrolidin-1-yl]butyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(piperazin-1-yl)butyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(3-fluoropropyl)piperidin-4-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-4-(3-hydroxypropyl)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-[3-(dimethylamino)propyl]-3-(2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 7-[3-(dimethylamino)propyl]-3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 7-[3-(dimethylamino)propyl]-3-(8-ethyl-2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(methylamino)ethyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(methylamino)propyl]-2H-chromen-2-one; 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-[3-(methylamino)propyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(2-methylpropyl)piperidin-4-yl]-2H-chromen-2-one; 7-{[1-(1,3-dihydroxypropan-2-yl)piperidin-4-yl]oxy}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-7-[1-(2-methylpropyl)piperidin-4-yl]-2H-chromen-2-one; 7-[1-(3-fluoropropyl)piperidin-4-yl]-3-(6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(pyrrolidin-1-yl)ethoxy]-2H-chromen-2-one; 7-(4-aminopiperidin-1-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(4-amino-4-methylpiperidin-1-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[4-(dimethylamino)piperidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[4-(diethylamino)piperidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(propan-2-ylamino)piperidin-1-yl]-2H-chromen-2-one; 7-[4-(cyclobutylamino)piperidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{4-[(1-hydroxypropan-2-yl)amino]piperidin-1-yl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(ethylamino)propyl]-2H-chromen-2-one; 7-(3-aminopropyl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-{4-[bis(2-hydroxyethyl)amino]piperidin-1-yl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-{4-[(1,3-dihydroxypropan-2-yl)amino]piperidin-1-yl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(ethylamino)ethoxy]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(2-methoxyethyl)amino]propyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(tetrahydrofuran-2-ylmethyl)amino]propyl}-2H-chromen-2-one; 7-[3-(benzylamino)propyl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(thiophen-3-ylmethyl)amino]propyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(pyridin-2-ylmethyl)amino]propyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{3-[(pyridin-4-ylmethyl)amino]propyl}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[ethyl(methyl)amino]ethoxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[ethyl(2-hydroxyethyl)amino]ethoxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(tetrahydrofuran-3-ylamino)propyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(3R)-3-hydroxypyrrolidin-1-yl]ethoxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(2-methylpiperidin-1-yl)azetidin-1-yl]-2H-chromen-2-one; 7-[3-(dimethylamino)azetidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[3-(diethylamino)azetidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(2,7-diazaspiro[4.4]non-2-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(2-{[(2R)-1-hydroxypropan-2-yl]amino}ethoxy)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(2-{[(2S)-1-hydroxypropan-2-yl]amino}ethoxy)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(2R)-pyrrolidin-2-ylmethoxy]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(2,2,6,6-tetramethyl-1,2,3,6-tetrahydropyridin-4-yl)-2H-chromen-2-one; 7-[(3R)-3-(aminomethyl)pyrrolidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[3-(piperidin-1-yl)azetidin-1-yl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(methylamino)butyl]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(piperidin-1-yl)ethoxy]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(3S)-3-hydroxypyrrolidin-1-yl]ethoxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(1-hydroxy-2-methylpropan-2-yl)amino]ethoxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(morpholin-4-yl)ethoxy]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[2-(4-hydroxypiperidin-1-yl)ethoxy]-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(1-ethyl-4-fluoropiperidin-4-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2-hydroxyethyl)amino]ethoxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2-methoxyethyl)amino]ethoxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-{2-[(2-hydroxypropyl)amino]ethoxy}-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[4-(2-hydroxy-2-methylpropyl)piperazin-1-yl]-2H-chromen-2-one; 7-[3-(aminomethyl)azetidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[(3S)-3-(aminomethyl)pyrrolidin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-{(3R)-3-[(dimethylamino)methyl]pyrrolidin-1-yl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-{3-[(dimethylamino)methyl]azetidin-1-yl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-{(3S)-3-[(dimethylamino)methyl]pyrrolidin-1-yl}-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[2-(diethylamino)ethyl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[3-(diethylamino)propyl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-[4-(diethylamino)butyl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(2,6-diazaspiro[3.3]hept-2-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(6-methyl-2,6-diazaspiro[3.3]hept-2-yl)-2H-chromen-2-one; 2-[3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl]hexahydropyrrolo[1,2-a]pyrazin-6(2H)-one; 1-[3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2-oxo-2H-chromen-7-yl]piperidine-4-carbonitrile; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-(4-hydroxypiperidin-1-yl)-2H-chromen-2-one; 7-(2,7-diazaspiro[3.5]non-7-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 7-(6-amino-2-azaspiro[3.3]hept-2-yl)-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyridin-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-3-(imidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyridin-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one; 3-(imidazo[1,2-a]pyridin-6-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-(4-methylpiperazin-1-yl)-2H-chromen-2-one; 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-[(8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl]-2H-chromen-2-one; 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-[(3S)-3-methylpiperazin-1-yl]-2H-chromen-2-one; 7-(2,6-diazaspiro[3.3]hept-2-yl)-3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-2H-chromen-2-one; and 3-(8-fluoro-2-methylimidazo[1,2-a]pyridin-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one, or a salt, isotopologue, stereoisomer, racemate, enantiomer, diastereomer or tautomer thereof.
 4. The compound of claim 3, wherein the compound is selected from: 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-benzoxazol-2-yl]-2H-chromen-2-one trifluoroacetate; 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-benzoxazol-2-yl]-2H-chromen-2-one hydrochloride; 7-(piperazin-1-yl)-3-[7-(trifluoromethyl)-1,3-benzoxazol-2-yl]-2H-chromen-2-one trifluoroacetate; 7-(piperazin-1-yl)-3-[7-(trifluoromethyl)-1,3-benzoxazol-2-yl]-2H-chromen-2-one hydrochloride; 2-oxo-N-phenyl-7-(piperazin-1-yl)-2H-chromene-3-carboxamide trifluoroacetate; 3-(1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 3-(7-chloro-1,3-benzothiazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 3-(4-chloro-1,3-benzothiazol-2-yl)-7-(piperidin-4-yl)-2H-chromen-2-one hydrochloride; 3-(5-fluoro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 3-(4-methyl-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 3-(4-fluoro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one trifluoroacetate; 7-(piperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one hydrochloride; 7-(4-methylpiperazin-1-yl)-3-[4-(trifluoromethyl)-1,3-thiazol-2-yl]-2H-chromen-2-one trifluoroacetate; 3-(4-iodo-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 3-(4-chloro-1,3-benzoxazol-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 3-([1,3]oxazolo[4,5-b]pyridin-2-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 7-[(1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl]-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one hydrochloride (1:3); 3-(3-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride (1:3); 7-(1,4-diazepan-1-yl)-3-(imidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one hydrochloride; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-(piperidin-4-yloxy)-2H-chromen-2-one hydrochloride; 3-(2-methylpyrimidin-4-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 3-(2-cyclopropylpyrimidin-4-yl)-7-(piperazin-1-yl)-2H-chromen-2-one hydrochloride; 7-(piperazin-1-yl)-3-[2-(propan-2-yl)pyrimidin-4-yl]-2H-chromen-2-one hydrochloride; 3-(imidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one hydrochloride (1:2); 3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one hydrochloride (1:2); 3-(7-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one hydrochloride (1:2); 3-(imidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one hydrochloride (1:2); 3-(2-methylimidazo[2,1-b][1,3]thiazol-6-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one hydrochloride (1:2); 3-(6-methylimidazo[1,2-a]pyridin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one hydrochloride (1:2); 3-(6-methylimidazo[1,2-a]pyrimidin-2-yl)-7-[(3R)-pyrrolidin-3-yloxy]-2H-chromen-2-one hydrochloride (1:2); 7-[(1-benzylpyrrolidin-3-yl)(methyl)amino]-3-(7-methylimidazo[1,2-a]pyrimidin-2-yl)-2H-chromen-2-one acetate; 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8-methoxy-6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one acetate (1:2); 7-[(3R)-3,4-dimethylpiperazin-1-yl]-3-(8-hydroxy-6-methylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one acetate; 7-[(3S)-3,4-dimethylpiperazin-1-yl]-3-(2-methyl-1,3-benzothiazol-6-yl)-2H-chromen-2-one acetate (2:1); 7-[(3S)-4-ethyl-3-methylpiperazin-1-yl]-3-(2-methyl-1,3-benzothiazol-6-yl)-2H-chromen-2-one acetate; 3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-7-[(3S)-3-ethyl-4-methylpiperazin-1-yl]-2H-chromen-2-one acetate; and 7-[(3S)-3,4-diethylpiperazin-1-yl]-3-(6,8-dimethylimidazo[1,2-a]pyrazin-2-yl)-2H-chromen-2-one acetate (1:2), or a free base, stereoisomer, racemate, enantiomer, diastereomer or tautomer thereof.
 5. A pharmaceutical composition comprising an effective amount of the compound of claim 1 and a pharmaceutically acceptable carrier, excipient or diluent.
 6. A compound selected from Formula (Ia):

or a free acid, free base, salt, stereoisomer, racemate, enantiomer, diastereomer or tautomer form thereof, wherein: R₁ is heterocyclyl selected from azetidin-1-yl, tetrahydrofuran-3-yl, piperidin-1-yl, piperidin-4-yl, piperazin-1-yl, 1,4-diazepan-1-yl, 1,2,5,6-tetrahydropyridin-3-yl, 1,2,3,6-tetrahydropyridin-4-yl, hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-1(2H)-yl, (3aS,6aS)-hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, (3aR,6aR)-hexahydropyrrolo[3,4-b]pyrrol-5(1H)-yl, hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, (3aR,6aS)-hexahydropyrrolo[3,4-c]pyrrol-2(1H)-yl, octahydro-5H-pyrrolo[3,2-c]pyridin-5-yl, octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aR,7aR)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, (4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl, hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, hexahydropyrrolo[1,2-a]pyrazin-6(2H)-one, (7R,8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-hexahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aS)-octahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, (8aR)-octahydropyrrolo[1,2-a]pyrazin-2(1H)-yl, octahydro-2H-pyrido[1,2-a]pyrazin-2-yl, 3-azabicyclo[3.1.0]hex-3-yl, 8-azabicyclo[3.2.1]oct-3-yl, (1R,5S)-8-azabicyclo[3.2.1]oct-3-yl, 8-azabicyclo[3.2.1]oct-2-en-3-yl, (1R,5S)-8-azabicyclo[3.2.1]oct-2-en-3-yl, 9-azabicyclo[3.3.1]non-3-yl, (1R,5S)-9-azabicyclo[3.3.1]non-3-yl, 2,5-diazabicyclo[2.2.1]hept-2-yl, (1S,4S)-2,5-diazabicyclo[2.2.1]hept-2-yl, 2,5-diazabicyclo[2.2.2]oct-2-yl, 3,8-diazabicyclo[3.2.1]oct-3-yl, (1R,5S)-3,8-diazabicyclo[3.2.1]oct-3-yl, 1,4-diazabicyclo[3.2.2]non-4-yl, azaspiro[3.3]hept-2-yl, 2,6-diazaspiro[3.3]hept-2-yl, 2,7-diazaspiro[3.5]non-7-yl, 5,8-diazaspiro[3.5]non-8-yl, 2,7-diazaspiro[4.4]non-2-yl and 6,9-diazaspiro[4.5]dec-9-yl optionally substituted with one, two or three R₃ substituents and one additional, optional R₄ substituent; R₂ is heteroaryl selected from thien-2-yl, thien-3-yl, 1H-pyrazol-4-yl, 1H-pyrazol-5-yl, 1H-imidazol-1-yl, 1H-imidazol-4-yl, 1,2,4-oxadiazol-3-yl, pyridin-2-yl, pyridin-3-yl, pyridin-4-yl, pyrimidin-4-yl, 1H-indol-3-yl, 1H-indol-4-yl, indol-5-yl, indol-6-yl, 1H-indazol-5-yl, 2H-indazol-5-yl, indolizin-2-yl, benzofuran-2-yl, benzothien-2-yl, benzothien-3-yl, 1H-benzimidazol-6-yl, 1,3-benzoxazol-5-yl, 1,3-benzoxazol-6-yl, 1,3-benzothiazol-5-yl, 1,3-benzothiazol-6-yl, 9H-purin-8-yl, furo[3,2-b]pyridin-2-yl, furo[3,2-c]pyridin-2-yl, furo[2,3-c]pyridin-2-yl, thieno[3,2-c]pyridin-2-yl, thieno[2,3-d]pyrimidin-6-yl, 1H-pyrrolo[2,3-b]pyridin-5-yl, 1H-pyrrolo[2,3-c]pyridin-4-yl, pyrrolo[1,2-a]pyrimidin-7-yl, pyrrolo[1,2-a]pyrazin-7-yl, pyrrolo[1,2-b]pyridazin-2-yl, pyrrolo[1,2-b]pyridazin-6-yl, pyrazolo[1,5-a]pyridin-2-yl, pyrazolo[1,5-a]pyrazin-2-yl, imidazo[2,1-b][1,3]thiazol-6-yl, imidazo[2,1-b][1,3,4]thiadiazol-6-yl, [1,3]oxazolo[4,5-b]pyridin-2-yl, imidazo[1,2-a]pyridin-6-yl, imidazo[1,2-a]pyrimidin-2-yl, imidazo[1,2-a]pyrimidin-6-yl, imidazo[1,2-c]pyrimidin-2-yl, imidazo[1,2-b]pyridazin-2-yl, imidazo[1,2-b]pyridazin-6-yl, imidazo[1,2-a]pyrazin-2-yl and quinoxalin-2-yl; wherein, each heteroaryl is optionally substituted with one, two or three R₆ substituents and one additional, optional R₇ substituent; R_(a) is, in each instance, independently selected from hydrogen, halogen or C₁₋₈alkyl; R_(b) is hydrogen, halogen, C₁₋₈alkyl or C₁₋₈alkoxy; R₃ is, in each instance, independently selected from cyano, halogen, hydroxy, oxo, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkyl-carbonyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, C₁₋₈alkoxy-C₁₋₈alkyl, C₁₋₈alkoxy-carbonyl, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino, amino-C₁₋₈alkyl, C₁₋₈alkyl-amino-C₁₋₈alkyl, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl, amino-C₁₋₈alkyl-amino, C₁₋₈alkyl-amino-C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino-C₁₋₈alkyl-amino, C₁₋₈alkoxy-C₁₋₈alkyl-amino, C₁₋₈alkyl-carbonyl-amino, C₁₋₈alkoxy-carbonyl-amino, hydroxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkoxy-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl-amino, (hydroxy-C₁₋₈alkyl)₂-amino or (hydroxy-C₁₋₈alkyl)(C₁₋₈alkyl)amino; R₄ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-C₁₋₈alkyl, C₃₋₁₄cycloalkyl-amino, aryl-C₁₋₈alkyl, aryl-C₁₋₈alkoxy-carbonyl, heterocyclyl or heterocyclyl-C₁₋₈alkyl; wherein, each instance of C₃₋₁₄cycloalkyl, aryl and heterocyclyl is optionally substituted with one, two or three R₅ substituents; R₅ is, in each instance, independently selected from halogen, hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio; R₆ is, in each instance, independently selected from halogen, hydroxy, cyano, nitro, C₁₋₈alkyl, halo-C₁₋₈alkyl, hydroxy-C₁₋₈alkyl, C₁₋₈alkoxy, halo-C₁₋₈alkoxy, amino, C₁₋₈alkyl-amino, (C₁₋₈alkyl)₂-amino or C₁₋₈alkyl-thio; and, R₇ is C₃₋₁₄cycloalkyl, C₃₋₁₄cycloalkyl-oxy, aryl, heterocyclyl or heteroaryl.
 7. The compound of claim 6, wherein the salt form is a chloride, hydrochloride, dihydrochloride, hydrobromide, acetate or trifluoroacetate salt. 